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self-xss-escalation

95 / 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

Escalate self-XSS to full-impact XSS via login CSRF, cookie bombing, path-specific cookie precedence, and double-XSS chains. Use when you have XSS that only fires in the attacker's own session.

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/'self-xss-escalation' ] || [ -L ~/.agents/skills/'self-xss-escalation' ]; then echo 'A skill folder named self-xss-escalation 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 "$d" checkout --quiet '3ceeb34c0c33dc36738cf0d4ec86e38b53d98216' -- 'capabilities/web-security/skills/self-xss-escalation' && mkdir -p ~/.agents/skills && cp -R "$d"/'capabilities/web-security/skills/self-xss-escalation' ~/.agents/skills/'self-xss-escalation' && 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/'self-xss-escalation' ~/.claude/skills/'self-xss-escalation' (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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