CVE-2025-27538
LOW2.2EPSS 0.10%Mattermost Missing Authentication for Critical Function
Published: 4/16/2025Modified: 2/4/2026
Description
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.
Affected packages (5)
- Go/github.com/mattermost/mattermost-server>= 9.11.0+incompatible, < 9.11.10+incompatible, >= 10.5.0+incompatible, < 10.5.2+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8>= 10.5.0, < 10.5.2
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250314142426-c049748b8863
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N |