CVE-2025-12756
Medium
Description
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mattermost Server
PublishedDec 1, 2025
First seenDec 1, 2025
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.5.13, 10.11.5, 10.12.2, 11.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.5.0 ≤ v < 10.5.13, 10.11.0 ≤ v < 10.11.5, 10.12.0 ≤ v < 10.12.2, 11.0.0 ≤ v < 11.0.3 | 10.5.13, 10.11.5, 10.12.2, 11.0.3 |
| github.com/mattermost/mattermost/server/v8Go | v ≤ 8.0.0-20251013062617-7977e7e6dae3, No range specified | — |
| github.com/mattermost/mattermostGo | 10.11.0 ≤ v ≤ 10.11.4, 10.12.0 ≤ v ≤ 10.12.1, 10.5.0 ≤ v ≤ 10.5.12, 11.0.0 ≤ v ≤ 11.0.2, No range specified, 10.5.0+incompatible ≤ v, 10.11.0+incompatible ≤ v, 10.12.0+incompatible ≤ v | — |
| github.com/mattermost/mattermost-serverGo | No range specified | — |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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