unboundcompute/security-agent-skills · skills/hunting-reflected-and-stored-xss/SKILL.md

hunting-reflected-and-stored-xss skillA

hunting-reflected-and-stored-xss is agent-read markdown (skill) from unboundcompute/security-agent-skills: Hunt reflected and stored cross-site scripting in server-rendered responses, where untrusted request or stored data is placed into an HTML response in a context whose encoding is missing or wrong, so the value becomes markup or script that runs in the victim's session. Covers the output context that decides the correct encoding, HTML body versus quoted or unquoted attribute versus inline script versus URL versus CSS, a template raw or safe marker that disables autoescaping, JSON embedded in a pa.

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-reflected-and-stored-xss@git:20260903.6dac719
Exact content
mdr add unboundcompute/security-agent-skills/hunting-reflected-and-stored-xss@sha256:a47b58eb7162d001

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_nbeseav4c5oswkk4.svg)](https://markdownregistry.com/a/art_nbeseav4c5oswkk4)

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Versions

versioncommittedcommitsizeaudit
git:20260903.6dac719 latest2026-09-03 6dac719 9,824 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 (9824 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_nbeseav4c5oswkk4
GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-reflected-and-stored-xss
GET https://markdownregistry.com/api/v1/blob/a47b58eb7162d001585da47db35da710354d2c24c4aed136b2424efb1015b250

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