broken-authentication SKILL.md skillA
broken-authentication from zebbern/claude-code-guide is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add zebbern/claude-code-guide/broken-authentication@v1.1Pins v1.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- zebbern/claude-code-guide
- Path
skills/broken-authentication/SKILL.md- Versions recorded
- 3
- Latest version
- v1.1, committed May 31, 2026
- First version recorded
- Jan 4, 2026
- Size
- 12,606 bytes
- Repository stars
- 4,666
- License
- MIT
This skill should be used when the user asks to "test for broken authentication vulnerabilities", "assess session management security", "perform credential stuffing tests", "evaluate password policies", "test for session fixation", or "identify authentication bypass flaws". It provides comprehensive techniques for identifying authentication and session management weaknesses in web applications.
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
# Broken Authentication Testing ## Purpose Identify and exploit authentication and session management vulnerabilities in web applications. Broken authentication consistently ranks in the OWASP Top 10 and can lead to account takeover, identity theft, and unauthorized access to sensitive systems. This skill covers testing methodologies for password policies, session handling, multi-factor authentication, and credential management. ## Prerequisites ### Required Knowledge - HTTP protocol and session mechanisms - Authentication types (SFA, 2FA, MFA) - Cookie and token handling - Common authentication frameworks ### Required Tools - Burp Suite Professional or Community - Hydra or similar brute-force tools - Custom wordlists for credential testing - Browser developer tools ### Required Access - Target application URL - Test account credentials - Written authorization for testing ## Outputs and Deliverables 1. **Authentication Assessment Report** - Document all identified vulnerabilities 2. **Credential Testing Results** - Brute-force and dictionary attack outcomes 3. **Session Security Analysis** - Token randomness and timeout evaluation …
Read the whole file at its exact version.
How to install
mdr add zebbern/claude-code-guide/broken-authentication@sha256:36289965b69c82cbThe line at the top of this page pins the label v1.1, 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_6jbp53gonv2l5rnc)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 4, 2026 and May 31, 2026, about one every 74 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1 latest | 2026-05-31 | 164971d | 12,606 B | A | view · diff |
| v1.1 | 2026-01-20 | 27bf883 | 12,614 B | A | view · diff |
| git:20260104.9174e17 | 2026-01-04 | 9174e17 | 12,569 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12606 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
zebbern/claude-code-guide · 4,666 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6jbp53gonv2l5rnc GET https://markdownregistry.com/api/v1/resolve?ref=zebbern/claude-code-guide/broken-authentication GET https://markdownregistry.com/api/v1/blob/36289965b69c82cbaff49efe25d96caf94aa71d0a8c139b1af8fff755634ef41
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.
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