oauth-oidc-misconfiguration

OAuth redirect URI validation checks whether callback handling can be bypassed or chained through open redirects. You verify that redirect URIs are validated correctly to prevent authorization code interception and account takeover risks.

PKCE enforcement verifies the Proof Key for Code Exchange across web, SPA, and mobile authentication flows. It prevents authorization code interception attacks by requiring a code verifier and challenge during the token exchange process.

Validating state and nonce parameters in OpenID Connect involves verifying their presence and correctness across authentication flows. This prevents cross-site request forgery and token replay attacks during identity provider callbacks.

Testing token audience and issuer checks for SSO integration security verifies that tokens are accepted only from trusted identity providers and intended recipients. This prevents token abuse and cross-user binding issues in enterprise login flows.

Detecting account binding flaws in OAuth identity provider integrations involves analyzing authorization code exchanges and identity-provider trust boundaries. This exposes cases where one identity-provider account attaches to the wrong local user session.

Common OAuth misconfiguration flaws in login with Google integrations include missing state validation, weak redirect URI checks, and token reuse flaws. Analyzing authorization callbacks and scope handling exposes these redirect and token binding weaknesses.