Description
Mattermost versions 9.10.x <= 9.10.2, 9.11.x <= 9.11.1, 9.5.x <= 9.5.9 and 10.0.x <= 10.0.0 fail to properly authorize the requests to /api/v4/channels which allows a User or System Manager, with "Read Groups" permission but with no access for channels to retrieve details about private channels that they were not a member of by sending a request to /api/v4/channels.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mattermost Mattermost
Default version status: unaffected
9.10.0 to ≤ 9.10.2affected9.11.0 to ≤ 9.11.1affected9.5.0 to ≤ 9.5.9affected10.0.0affected10.1.0unaffected9.10.3unaffected9.11.2unaffected9.5.10unaffected10.0.1unaffected