offensive-xss skillC
offensive-xss is agent-read markdown (skill) from snailsploit/claude-red.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# SKILL: Cross-Site Scripting (XSS) ## Metadata - **Skill Name**: xss - **Folder**: offensive-xss - **Source**: https://github.com/SnailSploit/offensive-checklist/blob/main/xss.md ## Description Cross-Site Scripting testing checklist: stored/reflected/DOM/blind XSS discovery, polyglot payloads, CSP bypass, XSS filter bypass, event handler injection, DOM clobbering, mutation XSS, and impact escalation (session hijack, phishing, keylogging). Use for web app XSS testing and bug bounty. ## Trigger Phrases Use this skill when the conversation involves any of: `XSS, cross-site scripting, stored XSS, reflected XSS, DOM XSS, blind XSS, CSP bypass, XSS filter bypass, polyglot, DOM clobbering, mutation XSS, event handler injection` ## Instructions for Claude When this skill is active: 1. Load and apply the full methodology below as your operational checklist 2. Follow steps in order unless the user specifies otherwise 3. For each technique, consider applicability to the current target/context 4. Track which checklist items have been completed 5. Suggest next steps based on findings --- ## Full Methodology # Cross-Site Scripting (XSS) ## Shortcut …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-xss@git:20260506.70e0c89mdr add snailsploit/claude-red/offensive-xss@sha256:6c688051d7e82ebcPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_chapjgvqfk7niei7)
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Versions
Audit of the latest version
- fail: Frontmatter block present
- fail: Frontmatter declares a name
- fail: Frontmatter declares a description
- fail: No prompt-injection phrasing (matched: Ignore previous instructions)
- fail: No script tag (matched: <script)
- pass: Size between 200 bytes and 200 KB (24895 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
Source
snailsploit/claude-red · 6,831 stars · license MIT · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_chapjgvqfk7niei7 GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-xss GET https://markdownregistry.com/api/v1/blob/6c688051d7e82ebcf3da3ec53aa25f49bdb4e332895d49132e0117462fa3ffb4
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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