CVE-2025-27933

Mattermost CVE-2025-27933 affects Mattermost Server 9.11.x <= 9.11.8, 10.3.x <= 10.3.3, and 10.4.x

CVE-2025-27933 Unauthorized Private-to-Public Channel Conversion

Mattermost versions 10.4.x = 10.4.2, 10.3.x = 10.3.3, 9.11.x = 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public...

CVE-2025-27933 Unauthorized Private-to-Public Channel Conversion

Mattermost versions 10.4.x = 10.4.2, 10.3.x = 10.3.3, 9.11.x = 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public...