GHSA-H5V9-XW2G-7HRQ Mattermost allows members with permission to convert public channels to private and convert private to public

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