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mukul975
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Complete skill folder anatomy across all cybersecurity skills: - scripts/agent.py: 80-150 line Python agents using real libraries (impacket, boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.) - references/api-reference.md: real API documentation with method signatures - LICENSE: MIT license for all skill folders
63 lines
2.0 KiB
Markdown
63 lines
2.0 KiB
Markdown
# API Reference: Testing for XSS Vulnerabilities with Burp Suite
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## Burp Suite Professional Components
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### Scanner
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- Active scan: Automatically tests parameters for XSS
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- Passive scan: Identifies reflected inputs and missing security headers
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- Scan configuration: XSS-focused audit checks
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### Repeater
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- Send individual requests for manual payload testing
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- Compare request/response pairs across payload variations
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- Test character encoding behavior
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### Intruder
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- Positions: Mark injectable parameters
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- Payloads: Load XSS wordlists
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- Grep-Match: Flag responses containing `alert(`, `onerror=`, `<script>`
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- Attack types: Sniper (single param), Battering Ram (same payload all positions)
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### DOM Invader
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- Built-in browser extension for DOM XSS testing
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- Canary injection and sink monitoring
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- Source-to-sink data flow tracing
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## requests Library (Companion Script)
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### Reflection Detection
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```python
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canary = "xsscanary12345"
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resp = requests.get(f"{url}?q={canary}")
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if canary in resp.text:
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# Determine context and fuzz with payloads
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```
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### Character Encoding Test
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```python
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resp = requests.get(f'{url}?q={quote("<>\"\'&/")}'
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unencoded = [ch for ch in '<>"\'&/' if ch in resp.text]
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```
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## Burp Extensions for XSS
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| Extension | Purpose |
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|-----------|---------|
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| Hackvertor | Advanced payload encoding/transformation |
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| XSS Validator | Confirm XSS execution in headless browser |
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| Reflector | Highlight reflected parameters in proxy |
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| Active Scan++ | Enhanced active scanning rules |
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## CSP Bypass Techniques
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| Weakness | Bypass |
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|----------|--------|
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| `unsafe-inline` | Direct `<script>` injection |
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| `unsafe-eval` | Use `eval()`, `setTimeout()` |
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| Whitelisted CDN | JSONP callback or Angular gadgets |
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| Missing `base-uri` | `<base>` tag hijack for relative scripts |
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## References
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- Burp Suite docs: https://portswigger.net/burp/documentation
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- PortSwigger XSS labs: https://portswigger.net/web-security/cross-site-scripting
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- DOM Invader: https://portswigger.net/burp/documentation/desktop/tools/dom-invader
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- Dalfox (CLI scanner): https://github.com/hahwul/dalfox
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