Jopraveen

**Name of the Vulnerable Software and Affected Versions** Mattermost Desktop App versions 5.5.13 Mattermost Desktop App versions 6.0.2.0 Mattermost Desktop App versions prior to 6.3 **Description** The application fails to properly perform a null check when verifying headers. This allows a user to cause the application to crash for other channel members by posting a malicious link containing an embedded image that is missing one of the required headers. **Recommendations** Update Mattermost Desktop App version 5.5.13 to a newer version. Update Mattermost Desktop App version 6.0.2.0 to a newer version. Update Mattermost Desktop App versions prior to 6.3 to a newer version.