CVE-2025-12756 json
Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion
published 2025-12-01 11 mo ago modified 2026-10-19 21 d ago also GHSA-p6gj-jc38-x2m7 , GO-2025-4172 , EUVD-2025-200087
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Mattermost Mattermost 10.5.13, 10.11.5, 10.12.2, 11.0.3, 11.1.0
- govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20251209T172047-150000.1.127.1
suse advisories SUSE-SU-2025:4395-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | <=8.0.0-20251013062617-7977e7e6dae3 all versions |
no fix listed |
| go | github.com/mattermost/mattermost | >=10.11.0, <=10.11.4 >=10.12.0, <=10.12.1 >=10.5.0, <=10.5.12 >=11.0.0, <=11.0.2 all versions >=10.5.0+incompatible >=10.11.0+incompatible >=10.12.0+incompatible |
no fix listed |
| go | github.com/mattermost/mattermost-server | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v5 | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-12756
advisory
-
github.com
/mattermost/mattermost
package
-
github.com
/advisories/GHSA-p6gj-jc38-x2m7
advisory
Sources
- CVE List CVE-2025-12756
- GitHub Advisory GHSA-p6gj-jc38-x2m7
- NVD CVE-2025-12756
- OSV GO-2025-4172
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.