CVE-2025-11777
published 2025-11-13CVE-2025-11777: Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows…
medium4.3CVSS 3.1
AVNACLPRLUINSUCLINAN
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost | >= 0 < 5.3.2-0.20250905150616-ba86dfc5876b | 5.3.2-0.20250905150616-ba86dfc5876b |
| github.com | mattermost_mattermost-server | >= 0 < 5.3.2-0.20250905150616-ba86dfc5876b | 5.3.2-0.20250905150616-ba86dfc5876b |
| github.com | mattermost_mattermost-server | >= 10.11.0 < 10.11.4 | 10.11.4 |
| github.com | mattermost_mattermost-server | >= 10.11.0+incompatible < 10.11.4+incompatible | 10.11.4+incompatible |
| github.com | mattermost_mattermost-server | >= 10.5.0 < 10.5.12 | 10.5.12 |
| github.com | mattermost_mattermost-server | >= 10.5.0+incompatible < 10.5.12+incompatible | 10.5.12+incompatible |
| github.com | mattermost_mattermost-server_v5 | >= 0 < 5.3.2-0.20250905150616-ba86dfc5876b | 5.3.2-0.20250905150616-ba86dfc5876b |
| github.com | mattermost_mattermost-server_v6 | >= 0 < 5.3.2-0.20250905150616-ba86dfc5876b | 5.3.2-0.20250905150616-ba86dfc5876b |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20251212204551-54f2e9b4afd5 | 8.0.0-20251212204551-54f2e9b4afd5 |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250905150616-ba86dfc5876b | 8.0.0-20250905150616-ba86dfc5876b |
| mattermost | mattermost | 10.11.0 – 10.11.3 | — |
| mattermost | mattermost | 10.5.0 – 10.5.11 | — |
| mattermost | mattermost_server | >= 10.11.0 < 10.11.4 | 10.11.4 |
| mattermost | mattermost_server | >= 10.5.0 < 10.5.12 | 10.5.12 |