Jclem

**Name of the Vulnerable Software and Affected Versions** Doorkeeper gem versions prior to 4.2.0 **Description** The issue allows remote attackers to conduct replay attacks or revoke arbitrary tokens by leveraging the failure to implement the OAuth 2.0 Token Revocation specification. **Recommendations** For versions prior to 4.2.0, update to version 4.2.0 or later to resolve the issue.