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mcp-auth-exploitation

90 / 100 · Low risk

Fine to try. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By dreadnode/capabilities (GitHub) · security · 22 stars · scanned at commit 3ceeb34

Exploit MCP authorization flows — CIMD SSRF via client_manifest_uri/logo_uri/jwks_uri, Dynamic Client Registration abuse, token scope inflation in multi-agent chains, confused deputy attacks. Use when target exposes MCP authorization, OIDC Dynamic Client Registration (RFC 7591), or multi-agent token delegation.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

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

if [ -e ~/.agents/skills/'mcp-auth-exploitation' ] || [ -L ~/.agents/skills/'mcp-auth-exploitation' ]; then echo 'A skill folder named mcp-auth-exploitation already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/dreadnode/capabilities' "$d" && git -C "$d" checkout --quiet '3ceeb34c0c33dc36738cf0d4ec86e38b53d98216' -- 'capabilities/web-security/skills/mcp-auth-exploitation' && mkdir -p ~/.agents/skills && cp -R "$d"/'capabilities/web-security/skills/mcp-auth-exploitation' ~/.agents/skills/'mcp-auth-exploitation' && 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/'mcp-auth-exploitation' ~/.claude/skills/'mcp-auth-exploitation' (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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