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xss-html-injection

This skill should be used when the user asks to "test for XSS vulnerabilities", "perform cross-site scripting attacks", "identify HTML injection flaws", "exploit client-side injection vulnerabilities", "steal cookies via XSS", or "bypass content security policies". It provides comprehensive techniques for detecting, exploiting, and understanding XSS and HTML injection attack vectors in web applications.

65

Quality

77%

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SecuritybySnyk

Critical

Do not install without reviewing

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tessl review fix ./skills/xss-html-injection/SKILL.md
SKILL.md
Quality
Evals
Security

Security

1 critical severity finding. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.

Critical

E006: Malicious code pattern detected in skill scripts.

What this means

Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.

Why it was flagged

This document contains explicit, actionable payloads and delivery instructions that facilitate unauthorized data exfiltration, credential theft, and session hijacking (e.g., scripts sending cookies/keystrokes to attacker-controlled servers and phishing forms), representing high-risk malicious behavior.

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Repository
zebbern/claude-code-guide
Audited
Security analysis
Snyk

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