Justin Bull

**Name of the Vulnerable Software and Affected Versions** MediaWiki OAuth2 Client extension versions prior to 0.4 **Description** A CSRF issue exists due to the OAuth2 state parameter not being checked in the callback function, allowing a remote attacker to perform a cross-site request forgery. This could potentially enable an attacker to carry out actions on behalf of another user without their knowledge or consent. **Recommendations** For versions prior to 0.4, update to version 0.4 or later to resolve the issue. As a temporary workaround, consider implementing additional validation checks for the OAuth2 state parameter in the callback function to prevent CSRF attacks.