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phy-cors-audit

77 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.

By LeoYeAI/agent-master-skills (GitHub) · coding · 2,186 stars · scanned at commit 8f88f9a

CORS (Cross-Origin Resource Sharing) misconfiguration auditor. Probes any API endpoint with crafted Origin headers to detect the most dangerous CORS vulnerabilities — reflecting arbitrary Origins (any attacker.com gets CORS approved), Access-Control-Allow-Credentials:true with wildcard ACAO, null-Origin allowed (iframe/file:// bypass), subdomain regex bypasses (evil.myapp.com passes), missing Vary:Origin (CDN cache poisoning), and permissive preflight responses. Also scans source code for insec…

Works with any agent that supports SKILL.md skills.

What this skill can do

Safer alternatives

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

• 95 Low riskauditing-cors-policyjeremylongshore/tons-of-skills-marketplace · 2,911 stars
• 90 Low riskcorsBitterSecurity/Decepticon · 6,581 stars
• 100 Low riskCORS Security TestingPramodDutta/qaskills · 248 stars

Install

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

if [ -e ~/.agents/skills/'phy-cors-audit' ] || [ -L ~/.agents/skills/'phy-cors-audit' ]; then echo 'A skill folder named phy-cors-audit already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/LeoYeAI/agent-master-skills' "$d" && git -C "$d" checkout --quiet '8f88f9a0dd5a1075d4f0c7626f9d960844d57575' -- 'skills/phy-cors-audit' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/phy-cors-audit' ~/.agents/skills/'phy-cors-audit' && 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/'phy-cors-audit' ~/.claude/skills/'phy-cors-audit' (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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