dreadnode/capabilities · capabilities/web-security/skills/inline-script-breakout-exfil/SKILL.md

inline-script-breakout-exfil skillB

inline-script-breakout-exfil is agent-read markdown (skill) from dreadnode/capabilities: Exfiltrate data from stored XSS inside inline script blocks when constrained by unquoted HTML attribute context, WAF, and CSP. Use when XSS payload lands inside server-rendered inline script and standard exfil (fetch, eval, atob) is blocked..

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/inline-script-breakout-exfil@git:20260529.17de87f
Exact content
mdr add dreadnode/capabilities/inline-script-breakout-exfil@sha256:597c9eb7fac509f4

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_p6kshcui4tip7dkk.svg)](https://markdownregistry.com/a/art_p6kshcui4tip7dkk)

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Versions

versioncommittedcommitsizeaudit
git:20260529.17de87f latest2026-05-29 17de87f 3,931 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (3931 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

GitHub

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

API

GET https://markdownregistry.com/api/v1/artifacts/art_p6kshcui4tip7dkk
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/inline-script-breakout-exfil
GET https://markdownregistry.com/api/v1/blob/597c9eb7fac509f423b6e3b41a972174cd93d9dca21b0da0b04d0767fc17e1e8

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