Mattermost security vulnerabilities

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. A security vulnerability exists in Mattermost versions 9.9.x through 9.9.1, 9.5.x through 9.5.7, 9.10.x through 9.10.0, and 9.8.x through 9.8.2 that stems from a failure to ensure that a...