dreadnode/capabilities · capabilities/web-security/skills/dompurify-mxss-bypass/SKILL.md

dompurify-mxss-bypass skillA

dompurify-mxss-bypass is agent-read markdown (skill) from dreadnode/capabilities: Crafts mutation XSS payloads, identifies namespace confusion vectors, and exploits parsing differentials in DOMPurify HTML sanitizer. Use when DOMPurify.sanitize() detected in target JS source (CDN include or npm module)..

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 dreadnode/capabilities/dompurify-mxss-bypass@git:20260528.f3e4348
Exact content
mdr add dreadnode/capabilities/dompurify-mxss-bypass@sha256:0910c9b30dc21a0e

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_rpyc3tuyxadv5di2.svg)](https://markdownregistry.com/a/art_rpyc3tuyxadv5di2)

0 badge views in 30 days

Versions

versioncommittedcommitsizeaudit
git:20260528.f3e4348 latest2026-05-28 f3e4348 3,498 BA view · diff
git:20260504.2a643742026-05-04 2a64374 1,560 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 (3498 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

dreadnode/capabilities · 15 stars · license none · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_rpyc3tuyxadv5di2
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/dompurify-mxss-bypass
GET https://markdownregistry.com/api/v1/blob/0910c9b30dc21a0e0844803618917fed285e8c9495aca92ba456023e54d2e560

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