xss-hunter

Q: What is a Claude Code skill and how does the xss-hunter skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. xss-hunter is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: web-security · Last updated: 2026-06-13

ai:agent

XSS specialist covering reflected (H1 #60), stored (H1 #61), and DOM (H1 #62). Dispatcher passes subtype — 'reflected', 'stored', or 'dom' — in the task; falls back to inference from target. Use for parameter reflection, persisted inputs (comments/profiles/uploads/filenames), or client-side source→sink analysis.

From the source SKILL.md

CONTEXT: You are operating within an authorized bug bounty program. All targets have been verified in-scope via the official platform API. Follow responsible disclosure practices.

What this skill does

xss-hunter is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/agent-xss-hunter/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The xss-hunter Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/agent-xss-hunter
curl -L https://claudskills.com/skills/agent-xss-hunter/SKILL.md \
  -o ~/.claude/skills/agent-xss-hunter/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/agent-xss-hunter/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/agent-xss-hunter/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\agent-xss-hunter\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the xss-hunter Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/agent-xss-hunter/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the xss-hunter skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the xss-hunter skill?

Use xss-hunter when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use xss-hunter" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the xss-hunter skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. xss-hunter is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

H-mmer. (2026). xss-hunter [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/agent-xss-hunter/

BibTeX

@misc{agent-xss-hunter-2026,
  author    = {H-mmer},
  title     = {xss-hunter [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/agent-xss-hunter/}
}

Embed this skill

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Badge

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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