novaestellar/novahaku · testing/hunt/hunt-xxe/SKILL.md

hunt-xxe skillF

hunt-xxe is agent-read markdown (skill) from novaestellar/novahaku: Hunting skill for xxe vulnerabilities. Built from 10 public bug bounty reports including SVG-upload XXE, Office-doc (PPTX/DOCX) XXE, SOAP XXE, SAML AssertionConsumer XXE, blind OOB XXE via DTD callback, parameter-entity XXE, XXE-to-LFI, XXE-to-SSRF, and XXE-to-RCE chains (Adobe Commerce CosmicSting CVE-2024-34102). Use when hunting XXE on any target — emphasis on OOB-Or-It-Didn't-Happen Gate for blind cases..

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.

How to install

Latest version
mdr add novaestellar/novahaku/hunt-xxe@git:20260910.546fe86
Exact content
mdr add novaestellar/novahaku/hunt-xxe@sha256:0b5938f5855e0526

Pin 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_4oefnckzipxlicfv.svg)](https://markdownregistry.com/a/art_4oefnckzipxlicfv)

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Versions

versioncommittedcommitsizeaudit
git:20260910.546fe86 latest2026-09-10 546fe86 23,074 BF view · diff
git:20260903.29924dd2026-09-03 29924dd 23,086 BF view · diff
git:20260903.fa855c42026-09-03 fa855c4 23,057 BF view

Audit of the latest version

F  15 of 17 checks passed. Deterministic, no model, same answer every run.
  • FAIL, critical: No link to an exfiltration or paste host (matched: http://YOUR.BURPCOLLABORATOR)
  • fail: No link to a raw IP address (matched: http://169.254.169.254)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (23074 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • 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 script tag

Source

GitHub

novaestellar/novahaku · 24 stars · license none · pushed 2026-09-10 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_4oefnckzipxlicfv
GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-xxe
GET https://markdownregistry.com/api/v1/blob/0b5938f5855e05265066503a78cc8232a5a93fb894dee9dacc695bfc63afaa73

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.