# Auth Sec

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- **Type:** Skill
- **Install:** `agentstack add skill-yaklang-hack-skills-auth-sec`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [yaklang](https://agentstack.voostack.com/s/yaklang)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [yaklang](https://github.com/yaklang)
- **Source:** https://github.com/yaklang/hack-skills/tree/main/skills/auth-sec

## Install

```sh
agentstack add skill-yaklang-hack-skills-auth-sec
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Authentication and Authorization Router

This is the routing entry point for authentication, sessions, and authorization boundaries.

Use it to decide whether the issue is mainly login mechanics, object-level authorization, browser trust boundaries, or identity protocols such as OAuth/JWT/SAML before going deeper.

## When to Use

- The target includes login, registration, password reset, 2FA, sessions, JWT, OAuth, or SSO
- You suspect object authorization flaws, cross-tenant access, cross-origin reads, CSRF, or protocol misconfiguration
- You need to decide whether to test authentication or authorization first

## Skill Map

- [Authentication Bypass](../authbypass-authentication-flaws/SKILL.md): login bypass, password reset, 2FA, enumeration, brute-force protections
- [IDOR Broken Object Authorization](../idor-broken-object-authorization/SKILL.md): IDOR, BOLA, BFLA, missing object permissions
- [JWT OAuth Token Attacks](../jwt-oauth-token-attacks/SKILL.md): algorithm confusion, key trust issues, claim abuse, token forgery
- [OAuth OIDC Misconfiguration](../oauth-oidc-misconfiguration/SKILL.md): redirect URI, state, nonce, PKCE, account binding
- [CSRF Cross Site Request Forgery](../csrf-cross-site-request-forgery/SKILL.md): CSRF tokens, SameSite, JSON CSRF, login CSRF
- [CORS Cross Origin Misconfiguration](../cors-cross-origin-misconfiguration/SKILL.md): reflected Origin, credentialed cross-origin reads, allowlist bypass
- [SAML SSO Assertion Attacks](../saml-sso-assertion-attacks/SKILL.md): assertion wrapping, signature validation, audience, ACS boundaries

## Recommended Flow

1. First confirm the authentication model and session boundaries
2. Then confirm object-level and function-level authorization
3. Then move to token, cross-origin, and protocol details
4. If enterprise federation exists, continue with OAuth, OIDC, or SAML topics

## Related Categories

- [api-sec](../api-sec/SKILL.md)
- Default credentials, username variants, wordlist sizing, and port focus are consolidated in [authbypass-authentication-flaws](../authbypass-authentication-flaws/SKILL.md)

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [yaklang](https://github.com/yaklang)
- **Source:** [yaklang/hack-skills](https://github.com/yaklang/hack-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-yaklang-hack-skills-auth-sec
- Seller: https://agentstack.voostack.com/s/yaklang
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.