Individual skill
sast-xss
Detect Cross-Site Scripting (XSS) vulnerabilities in a codebase using a three-phase approach: recon (find HTML/JS/DOM sink sites), batched verify (trace user input to sinks in parallel subagents, 3 sink sites each), and merge (consolidate batch results). Requires sast/architecture.md (run sast-analysis first). Outputs findings to sast/xss-results.md. Use when asked to find XSS or cross-site scripting bugs.
sast-files/.claude/skills/sast-xss/SKILL.md
Source commit 3a5bf8f0efe31d1d4731c164ca86abd9a3bbd166
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 9, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 1,364
- Repository last updated
- Oct 23, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-security Repository topic
- claude Repository topic
- claude-code Repository topic
- sast Repository topic
- engineering Derived category
- security Derived category
- security-application Derived category
Files and excerpt
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# Cross-Site Scripting (XSS) Detection
You are performing a focused security assessment to find Cross-Site Scripting vulnerabilities in a codebase. This skill uses a three-phase approach with subagents: **recon** (find sink sites), **batched verify** (trace taint for parallel batches of up to 3 sinks each), and **merge** (consolidate batch results into one report).
**Prerequisites**: `sast/architecture.md` must exist. Run the analysis skill first if it doesn't.
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## What is XSS
XSS occurs when user-supplied input is incorporated into a web page's HTML, JavaScript, or DOM without proper escaping or sanitization. This allows attackers to inject and execute arbitrary scripts in victims' browsers, leading to session hijacking, credential theft, defacement, and malware distribution.
The core pattern: *unescaped, unsanitized user input reaches an HTML/JS output sink.*
