Improper Authentication

github.com/mattermost/mattermost-server is vulnerable to improper authentication. The vulnerability is due to the failure to negotiate a new token when accepting an invite, which allows an attacker who intercepts both the invite and password to send synchronization payloads to the original server...

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...

CVE-2025-6227 Invite token is used as part of the secure communication

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...