CVE-2026-2461 json
Missing authorization check allows unauthorized modification of other users' comments on a board
published 2026-03-16 7 mo ago modified 2026-06-17 4 mo ago also GHSA-hf8w-x9h5-5gf9 , GO-2026-4782 , EUVD-2026-12411
- 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 6%
- public exploits
- 0
- none known
Summary
Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559
Patch / fix
- go github.com/mattermost/mattermost-plugin-boards 0.0.0-20260108044135-57c5be5b6ef5
- Mattermost Mattermost 10.11.11, 11.2.3, 11.3.1, 11.4.0
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260326T203309-150000.1.155.2
suse advisories SUSE-SU-2026:1135-1
- 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
- 7 mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% 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-plugin-boards | <0.0.0-20260108044135-57c5be5b6ef5 |
0.0.0-20260108044135-57c5be5b6ef5 |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/mattermost/mattermost-plugin-boards/commit/57c5be5b6ef59d02dd72e35094d1fae8ba6e9619
web, patch
-
mattermost.com
/security-updates
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-2461
advisory
-
github.com
/mattermost/mattermost-plugin-boards
package
-
github.com
/advisories/GHSA-hf8w-x9h5-5gf9
advisory
Sources
- CVE List CVE-2026-2461
- GitHub Advisory GHSA-hf8w-x9h5-5gf9
- NVD CVE-2026-2461
- OSV GO-2026-4782
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.