offensive-file-upload skillC
offensive-file-upload 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: File Upload Vulnerabilities ## Metadata - **Skill Name**: file-upload - **Folder**: offensive-file-upload - **Source**: https://github.com/SnailSploit/offensive-checklist/blob/main/file-upload.md ## Description File upload vulnerability checklist: MIME type bypass, extension bypass, magic byte manipulation, path traversal in filenames, stored XSS via SVG/HTML upload, server-side processing attacks, and race conditions. Use for assessing file upload endpoints in web app pentests or bug bounty. ## Trigger Phrases Use this skill when the conversation involves any of: `file upload, MIME bypass, extension bypass, magic byte, path traversal upload, SVG XSS, polyglot, upload bypass, malicious upload, web shell upload` ## 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 # File Upload Vulnerabilities ## Mechanisms ```mermaid flowchart TD …
Read the whole file at its exact version.
How to install
mdr add snailsploit/claude-red/offensive-file-upload@git:20260506.70e0c89mdr add snailsploit/claude-red/offensive-file-upload@sha256:afd9029b2171fc5fPin 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_srbixidxrxcc6dnt)
1 badge views in 30 days
Versions
Audit of the latest version
- fail: Frontmatter block present
- fail: Frontmatter declares a name
- fail: Frontmatter declares a description
- fail: No script tag (matched: <script)
- pass: Size between 200 bytes and 200 KB (30690 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 prompt-injection phrasing
- 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_srbixidxrxcc6dnt GET https://markdownregistry.com/api/v1/resolve?ref=snailsploit/claude-red/offensive-file-upload GET https://markdownregistry.com/api/v1/blob/afd9029b2171fc5ffa70e2dc1deeab62ff362a0006f28ba98f2be475ca666b64
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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