← All skills

hunt-cors

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 elementalsouls/Claude-BugHunter (GitHub) · security · 5,515 stars · scanned at commit d5dcc53

Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers.

Works with any agent that supports SKILL.md skills.

What this skill can do

Safer alternatives

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

• 100 Low riskredteam-cors-miscfg-detail-packfb0sh/pentester · 24 stars
• 100 Low riskValidating CORS PoliciesBbgnsurfTech/claude-skills-collection · 29 stars
• 100 Low riskvalidating-cors-policiesBbgnsurfTech/claude-skills-collection · 29 stars

Install

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

if [ -e ~/.agents/skills/'hunt-cors' ] || [ -L ~/.agents/skills/'hunt-cors' ]; then echo 'A skill folder named hunt-cors already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/elementalsouls/Claude-BugHunter' "$d" && git -C "$d" checkout --quiet 'd5dcc5347675ed431488e0a0e46749e4918aa194' -- 'skills/hunt-cors' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/hunt-cors' ~/.agents/skills/'hunt-cors' && 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/'hunt-cors' ~/.claude/skills/'hunt-cors' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for elementalsouls/Claude-BugHunter shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/elementalsouls/Claude-BugHunter.svg)](https://zalavijaysinh.github.io/skilltrust/repos/elementalsouls/Claude-BugHunter/)

Score history