Mattermost versions 10.5.x <= 10.5.1, 9.11.x <= 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when the requesting user differs from the target user ID, which allows users with edit_other_users permission to activate or deactivate MFA for other users, even if those users have not set up MFA.
Exploitability
AV:NAC:HPR:HUI:NScope
S:UImpact
C:NI:LA:N2.2/CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:NAuthentication