Vaishnavi Pardeshi

**Name of the Vulnerable Software and Affected Versions** OpenProject versions 7.4.0 through 12.5.3 **Description** OpenProject is open source project management software. The issue arises when a user registers and confirms their first two-factor authentication (2FA) device for an account, and existing logged in sessions for that user account are not terminated. Similarly, if an administrator creates a mobile phone 2FA device on behalf of a user, their existing sessions are not terminated. The issue has been resolved in OpenProject version 12.5.4 by actively terminating sessions of user accounts having registered and confirmed a 2FA device. **Recommendations** For OpenProject versions 7.4.0 through 12.5.3, update to version 12.5.4 to resolve the issue. As a temporary workaround for users who register the first 2FA device on their account, manually log out to terminate all other active sessions, ensuring that the default behavior of OpenProject to terminate sessions upon 2FA device registration is not disabled through a configuration option.