unboundcompute/security-agent-skills · skills/hunting-xxe-and-xml-parser-trust/SKILL.md

hunting-xxe-and-xml-parser-trust skillA

hunting-xxe-and-xml-parser-trust is agent-read markdown (skill) from unboundcompute/security-agent-skills: Hunt XML external entity injection and unsafe XML parser features where untrusted XML is parsed with document type definitions, external general or parameter entities, or XInclude enabled. Covers in-band file disclosure and server-side request forgery through external entities, blind out-of-band exfiltration through parameter entities, and denial of service through entity expansion. The XML often hides inside other formats: office documents, SVG images, SOAP calls, and identity assertions all ca.

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 unboundcompute/security-agent-skills/hunting-xxe-and-xml-parser-trust@git:20260903.6dac719
Exact content
mdr add unboundcompute/security-agent-skills/hunting-xxe-and-xml-parser-trust@sha256:af7f37983fa489a0

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_6ahjgeltfp3p2aop.svg)](https://markdownregistry.com/a/art_6ahjgeltfp3p2aop)

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Versions

versioncommittedcommitsizeaudit
git:20260903.6dac719 latest2026-09-03 6dac719 9,517 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (9517 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

GitHub

unboundcompute/security-agent-skills · 5 stars · license MIT · pushed 2026-09-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_6ahjgeltfp3p2aop
GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-xxe-and-xml-parser-trust
GET https://markdownregistry.com/api/v1/blob/af7f37983fa489a0cbdd6956db97f3913f4dc999e7440b053d25decb1500dbeb

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