Description
Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.
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
0 to ≤ 7.8.12affected0 to ≤ 8.1.3affected0 to ≤ 9.0.1affected0 to ≤ 9.1.0affected9.0.2unaffected9.1.1unaffected7.8.13unaffected8.1.4unaffected