OAuth 2.0 & OIDC Security Audit (offensive-oauth)

Authorization & Scope Notice: This skill is part of the REA_Skill + claude-red Unified Security & Reverse Engineering Suite. It is designed strictly for authorized security assessments, defensive architecture reviews, vulnerability triage, bug bounty verification, and remediation engineering on software, infrastructure, and assets you own or have explicit permission to test.

Overview

OAuth 2.0 and OpenID Connect (OIDC) security assessment covering exact redirect_uri matching, PKCE (S256) enforcement, state parameter CSRF binding, implicit flow deprecation, token leakage via Referer/history, and pre-account takeover during social login linking.

Operational Workflow