Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channel…
Severity medium: primary CNA CVSS 6.5 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2025-09-15T10:06:15.094Z. Updated 2025-09-15T14:05:16.235Z.