CVE-2025-13870
LOW3.1EPSS 0.03%Mattermost fails to validate user permissions in Boards
Published: 12/2/2025Modified: 12/9/2025
Description
Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to
Affected packages (7)
- Go/github.com/mattermost/mattermost>= 10.5.0+incompatible, < 10.5.13+incompatible, >= 10.11.0+incompatible, < 10.11.5+incompatible
- Go/github.com/mattermost/mattermost>= 10.11.0, < 10.11.5
- Go/github.com/mattermost/mattermost-serverfrom 0
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20251212204551-54f2e9b4afd5
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250905150616-ba86dfc5876b
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |