offensive-xss SKILL.md skillC
offensive-xss from miosa-osa/osa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add miosa-osa/osa/offensive-xss@git:20260913.e13b6b8Pins git:20260913.e13b6b8 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- C, 15 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- miosa-osa/osa
- Path
priv/skills/offensive-xss/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260913.e13b6b8, committed Sep 13, 2026
- Size
- 25,950 bytes
- Repository stars
- 78
- License
- Apache-2.0
Cross-Site Scripting testing checklist: stored/reflected/DOM/blind XSS discovery, polyglot payloads, CSP bypass, XSS filter bypass, event handler injection, DOM clobbering, mutation XSS, and impact escalation (session hijack, phishing, keylogging). Use for web app XSS testing and bug bounty.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# SKILL: Cross-Site Scripting (XSS) ## Metadata - **Skill Name**: xss - **Folder**: offensive-xss - **Source**: https://github.com/SnailSploit/offensive-checklist/blob/main/xss.md ## Description Cross-Site Scripting testing checklist: stored/reflected/DOM/blind XSS discovery, polyglot payloads, CSP bypass, XSS filter bypass, event handler injection, DOM clobbering, mutation XSS, and impact escalation (session hijack, phishing, keylogging). Use for web app XSS testing and bug bounty. ## Trigger Phrases Use this skill when the conversation involves any of: `XSS, cross-site scripting, stored XSS, reflected XSS, DOM XSS, blind XSS, CSP bypass, XSS filter bypass, polyglot, DOM clobbering, mutation XSS, event handler injection` ## Full Methodology # Cross-Site Scripting (XSS) ## Shortcut - Look for user input opportunities on the application. When user input is stored and used to construct a web page later, test the input field for stored XSS. if user input in a URL gets reflected back on the resulting web page, test for reflected and DOM XSS. …
Read the whole file at its exact version.
How to install
mdr add miosa-osa/osa/offensive-xss@sha256:ce91b91906ff8715The line at the top of this page pins the label git:20260913.e13b6b8, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_eois5byjnjsxjqv5)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 13, 2026.
Audit of the latest version
- fail: No prompt-injection phrasing (matched: Ignore previous instructions)
- 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 (25950 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 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
miosa-osa/osa · 78 stars · license Apache-2.0 · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_eois5byjnjsxjqv5 GET https://markdownregistry.com/api/v1/resolve?ref=miosa-osa/osa/offensive-xss GET https://markdownregistry.com/api/v1/blob/ce91b91906ff8715d45d692dc12cf4f489b9db6d04449987ba2293c91904db9a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.