Description
Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their own client credentials, obtaining tokens for users who never authorized their application. This violates RFC 6749 Section 4.1.3. This vulnerability is fixed in 5.0.3.
Problem types
CWE-863: Incorrect Authorization
Product status
References
github.com/...nyauth/security/advisories/GHSA-xg2q-62g2-cvcm
github.com/...ommit/b2a1bfb1f532e87f205fa3afa3fc9f148c53ab89
github.com/steveiliop56/tinyauth/releases/tag/v5.0.3