hunt-file-upload SKILL.md skillA
hunt-file-upload from novaestellar/novahaku is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add novaestellar/novahaku/hunt-file-upload@git:20260927.e881f8aPins git:20260927.e881f8a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- novaestellar/novahaku
- Path
testing/hunt/hunt-file-upload/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260927.e881f8a, committed Sep 27, 2026
- Size
- 8,930 bytes
- Repository stars
- 28
- License
- MIT
Hunt file upload bugs — extension/MIME/magic-byte bypass, content-type manipulation, path traversal, stored XSS via SVG/HTML, webshell, XXE in DOCX, archive attacks, and processor SSRF (ImageMagick/ffmpeg/headless PDF). Use when testing upload, avatar, attachment, import, template, or media-processing endpoints.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Insecure File Uploads Upload surfaces are high risk: server-side execution (RCE), stored XSS, malware distribution, storage takeover, and DoS. Modern stacks mix direct-to-cloud uploads, background processors, and CDNs—authorization and validation must hold across every step. ## Attack Surface - Web/mobile/API uploads, direct-to-cloud (S3/GCS/Azure) presigned flows, resumable/multipart protocols (tus, S3 MPU) - Image/document/media pipelines (ImageMagick/GraphicsMagick, Ghostscript, ExifTool, PDF engines, office converters) - Admin/bulk importers, archive uploads (zip/tar), report/template uploads, rich text with attachments - Serving paths: app directly, object storage, CDN, email attachments, previews/thumbnails ## Reconnaissance ### Surface Map - Endpoints/fields: upload, file, avatar, image, attachment, import, media, document, template - Direct-to-cloud params: key, bucket, acl, Content-Type, Content-Disposition, x-amz-meta-*, cache-control - Resumable APIs: create/init → upload/chunk → complete/finalize; check if metadata/headers can be altered late - Background processors: thumbnails, PDF→image, virus scan queues; identify timing and status transitions …
Read the whole file at its exact version.
How to install
mdr add novaestellar/novahaku/hunt-file-upload@sha256:e8574de2e539b73fThe line at the top of this page pins the label git:20260927.e881f8a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3bgb4dwnvofywido)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 27, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8930 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
- pass: No script tag
Source
novaestellar/novahaku · 28 stars · license MIT · pushed 2026-09-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3bgb4dwnvofywido GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-file-upload GET https://markdownregistry.com/api/v1/blob/e8574de2e539b73f98472ab2cad35fcfecebfc8a68b224a24716135ed47257af
Your AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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