09-web-security

77 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By Masriyan/Claude-Code-CyberSecurity-Skill (GitHub) · security · 569 stars · scanned at commit 3aa77d8

OWASP Top 10 testing, injection vulnerability detection, API security

Works with any agent that supports SKILL.md skills.

What this skill can do

Downloads and installs other software

The author does not mention this.

Found in 5 places.

skills/09-web-security/SKILL.md, line 59pip install requests beautifulsoup4 urllib3 lxml
skills/09-web-security/scripts/api_security_tester.py, line 70logger.warning("PyYAML not installed — cannot parse YAML spec. pip install pyyaml")
skills/09-web-security/scripts/api_security_tester.py, line 397parser.error("requests is required: pip install requests")

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skills/09-web-security/scripts/owasp_scanner.py, line 125return {"error": "requests library required: pip install requests"}
skills/09-web-security/scripts/owasp_scanner.py, line 192parser.error("requests library required: pip install requests")

Runs commands on your computer

The author does not mention this. Expected for a security skill.

Found in 5 places.

skills/09-web-security/SKILL.md, line 59pip install requests beautifulsoup4 urllib3 lxml
skills/09-web-security/SKILL.md, line 184; id
skills/09-web-security/SKILL.md, line 303jwt_tool JWT_TOKEN_HERE -d

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skills/09-web-security/SKILL.md, line 434python scripts/owasp_scanner.py --url https://target.com --output report.json
skills/09-web-security/SKILL.md, line 440python scripts/api_security_tester.py --spec openapi.yaml --base-url https://api.target.com --output results.json

Sends data to these websites: evil.com, evil.target.com

This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.

Found in 5 places.

skills/09-web-security/SKILL.md, line 373requests.get(url, headers={"Origin": "https://evil.com"})
skills/09-web-security/SKILL.md, line 377requests.get(url, headers={"Origin": "null"})
skills/09-web-security/SKILL.md, line 381requests.get(url, headers={"Origin": "https://evil.target.com"})

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skills/09-web-security/scripts/api_security_tester.py, line 98resp = requests.request(
skills/09-web-security/scripts/owasp_scanner.py, line 55self.session = requests.Session()

Safer alternatives

Low-risk skills in the same category (security) that look related. Check that one does what you need.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'09-web-security' ] || [ -L ~/.agents/skills/'09-web-security' ]; then echo 'A skill folder named 09-web-security already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/Masriyan/Claude-Code-CyberSecurity-Skill' "$d" && git -C "$d" checkout --quiet '3aa77d84fb64cf07b550f6be4544bb91292db89f' -- 'skills/09-web-security' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/09-web-security' ~/.agents/skills/'09-web-security' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'09-web-security' ~/.claude/skills/'09-web-security' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-08	`3aa77d8`	77
2026-11-07	`3aa77d8`	77