CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCVE-2026-2461
Medium (4.3) in mattermost mattermost server. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-plugin-boards 0.0.0-20260108044135-57c5be5b6ef5.
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
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-31)
- CWE
- CWE-639
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hf8w-x9h5-5gf9 | Go | github.com/mattermost/mattermost-plugin-boards | <0.0.0-20260108044135-57c5be5b6ef5 | 0.0.0-20260108044135-57c5be5b6ef5 |
| GO-2026-4782 | Go | github.com/mattermost/mattermost-plugin-boards | <0.0.0-20260108044135-57c5be5b6ef5 | 0.0.0-20260108044135-57c5be5b6ef5 |