dreadnode/capabilities · capabilities/web-security/skills/esi-injection/SKILL.md

esi-injection skillB

esi-injection is agent-read markdown (skill) from dreadnode/capabilities: Inject ESI/SSI tags to achieve XSS, cookie theft, SSRF, or WAF bypass via edge/cache layer processing. Use when target has CDN/cache layer (Varnish, Squid, Akamai, Fastly) or serves .shtml files..

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/esi-injection@git:20260518.7b5f854
Exact content
mdr add dreadnode/capabilities/esi-injection@sha256:34362b4b01ee7c6f

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_4tng3oc4dhckayzh.svg)](https://markdownregistry.com/a/art_4tng3oc4dhckayzh)

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Versions

versioncommittedcommitsizeaudit
git:20260518.7b5f854 latest2026-05-18 7b5f854 3,769 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • 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 (3769 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 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_4tng3oc4dhckayzh
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/esi-injection
GET https://markdownregistry.com/api/v1/blob/34362b4b01ee7c6f365bb745d392ec4b7048bcdfe80b62db6a38f482d5f638c3

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