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hunt-auth-bypass

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Hunting skill for auth bypass vulnerabilities. Built from 12 public bug bounty reports across SAML XSW / parser-differential (GitHub Enterprise CVE-2025-25291/25292), SAML signature stripping (Uber, Rocket.Chat, samlify CVE-2025-47949), SAML domain enforcement bypass via control characters (HackerOne 2024), partner-portal cross-IdP assertion reuse (Slack), WordPress XMLRPC bypassing SSO (Uber), JWT alg-confusion HS256/RS256 (Jitsi), JWT signature-validation skip (Linktree, Newspack), and token-audience confusion (Argo CD CVE-2023-22482). Use when hunting auth bypass — see the Legacy-Protocol Matrix for branded-UI vs legacy-endpoint patterns.

redteam/hunt-auth-bypass/SKILL.md

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Network or broad shell
Last checked
Nov 9, 2026

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Nov 7, 2026
License
MIT

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## Crown Jewel Targets

Auth bypass is consistently one of the highest-paying vulnerability classes in bug bounty because it directly violates the most fundamental security control. High-value targets include:

- **SSO/SAML implementations** at enterprise SaaS companies (Slack, Okta, OneLogin integrations) — payouts regularly in the $5K–$25K+ range
- **Admin panels and partner/internal portals** — subdomain-separated admin surfaces like `partners.shopify.com`, `admin.company.com`
- **Third-party auth plugin integrations** — WordPress plugins (OneLogin, WP-SAML-Auth), Drupal SSO modules, any CMS with pluggable auth
- **XMLRPC endpoints** on WordPress — often forgotten, bypasses standard WP auth flows entirely
- **OAuth callback flows** — state parameter mishandling, redirect_uri mismatches
- **API authentication layers** — especially where auth was bolted on after the fact

**Asset priority:** Targets with federated identity (SAML, OAuth, OIDC) connected to large user populations. Partner/reseller portals are particularly juicy because they often have elevated permissions and less security scrutiny than the main product.

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