CVE-2025-6227

Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API. Assigner : responsibledisclosure@mattermost.com More information : https://mattermost.com/security-updates