CVE-2025-53971
published 2025-08-21CVE-2025-53971: Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to…
low3.8CVSS 3.1
AVNACLPRHUINSUCLILAN
Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 10.5.0 < 10.5.9 | 10.5.9 |
| github.com | mattermost_mattermost-server | >= 10.5.0+incompatible < 10.5.9+incompatible | 10.5.9+incompatible |
| github.com | mattermost_mattermost-server | >= 9.11.0 < 9.11.18 | 9.11.18 |
| github.com | mattermost_mattermost-server | >= 9.11.0+incompatible < 9.11.18+incompatible | 9.11.18+incompatible |
| github.com | mattermost_mattermost-server_v5 | 0 – 5.39.3 | — |
| github.com | mattermost_mattermost-server_v6 | 0 – 6.7.2 | — |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250721095846-c602a4a78e1f | 8.0.0-20250721095846-c602a4a78e1f |
| mattermost | mattermost | 10.5.0 – 10.5.8 | — |
| mattermost | mattermost | 9.11.0 – 9.11.17 | — |
| mattermost | mattermost_server | >= 10.5.0 < 10.5.9 | 10.5.9 |
| mattermost | mattermost_server | >= 9.11.0 < 9.11.18 | 9.11.18 |