Headline
GHSA-p6gj-jc38-x2m7: Mattermost fails to validate user permissions when deleting comments in Boards
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.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-12756
Mattermost fails to validate user permissions when deleting comments in Boards
Moderate severity GitHub Reviewed Published Dec 1, 2025 to the GitHub Advisory Database • Updated Dec 2, 2025
Package
gomod github.com/mattermost/mattermost (Go)
Affected versions
>= 10.11.0, <= 10.11.4
>= 10.12.0, <= 10.12.1
>= 10.5.0, <= 10.5.12
>= 11.0.0, <= 11.0.2
gomod github.com/mattermost/mattermost/server/v8 (Go)
<= 8.0.0-20251013062617-7977e7e6dae3
Published to the GitHub Advisory Database
Dec 1, 2025