Vulnerability · Published Dec 1, 2025 · Assigned by Mattermost
CVE-2025-12756Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
Medium 4.3
In plain English
A medium-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 90.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost | no fix listed | GHSA-p6gj-jc38-x2m7 |
| Go | github.com/mattermost/mattermost | no fix listed | GHSA-p6gj-jc38-x2m7 |
| Go | github.com/mattermost/mattermost | no fix listed | GHSA-p6gj-jc38-x2m7 |
| Go | github.com/mattermost/mattermost | no fix listed | GHSA-p6gj-jc38-x2m7 |
| Go | github.com/mattermost/mattermost | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost-server | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-4172 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GHSA-p6gj-jc38-x2m7 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 11.0.0 – through 11.0.210.12.0 – through 10.12.110.11.0 – through 10.11.410.5.0 – through 10.5.12 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N