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hunt-file-upload

69 / 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 file upload bugs — RCE via webshell, XSS via SVG/HTML, SSRF via XXE in DOCX, path traversal via filename. Bypass tables (10 techniques): double extension (shell.php.jpg if server checks last ext only), magic bytes spoofing (PNG header on PHP), null byte (shell.php\0.jpg), case (PHP, .Php, .pHP), .htaccess upload to enable execution, SVG with <script>, HTML/SVG XSS, DOCX with embedded XXE, ZIP slip (../../../etc/passwd in archive), polyglot files. Detection: any /upload, /avatar, /profile-p…

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.

• 90 Low risksecops-huntgoogle/skills · 23,813 stars
• 100 Low riskhunt-new-casebackbay-labs/thrunt-god · 41 stars
• 100 Low riskhunt-publishbackbay-labs/thrunt-god · 41 stars

Install

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

if [ -e ~/.agents/skills/'hunt-file-upload' ] || [ -L ~/.agents/skills/'hunt-file-upload' ]; then echo 'A skill folder named hunt-file-upload 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 "$d" checkout --quiet 'd5dcc5347675ed431488e0a0e46749e4918aa194' -- 'skills/hunt-file-upload' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/hunt-file-upload' ~/.agents/skills/'hunt-file-upload' && 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-file-upload' ~/.claude/skills/'hunt-file-upload' (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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The badge for elementalsouls/Claude-BugHunter shows the score of its lowest-scoring skill.

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