CVE-2025-14350
published 2026-02-16CVE-2025-14350: Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which…
medium4.3CVSS 3.1
AVNACLPRLUINSUCLINAN
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 0 < 5.3.2-0.20251209134645-761e56bb11cc | 5.3.2-0.20251209134645-761e56bb11cc |
| github.com | mattermost_mattermost-server | >= 10.11.0 | — |
| github.com | mattermost_mattermost-server | >= 10.11.0+incompatible | — |
| github.com | mattermost_mattermost-server | >= 11.1.0 | — |
| github.com | mattermost_mattermost-server | >= 11.1.0+incompatible | — |
| github.com | mattermost_mattermost-server | >= 11.2.0 | — |
| github.com | mattermost_mattermost-server | >= 11.2.0+incompatible | — |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20251209134645-761e56bb11cc | 8.0.0-20251209134645-761e56bb11cc |
| mattermost | mattermost | 10.11.0 – 10.11.9 | — |
| mattermost | mattermost | 11.1.0 – 11.1.2 | — |
| mattermost | mattermost | 11.2.0 – 11.2.1 | — |
| mattermost | mattermost_server | >= 10.11.0 < 10.11.10 | 10.11.10 |
| mattermost | mattermost_server | >= 11.1.0 < 11.1.3 | 11.1.3 |
| mattermost | mattermost_server | >= 11.2.0 < 11.2.2 | 11.2.2 |