VDB
GO-2025-4259
GO-2025-4259
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost doesn't validate user channel membership when attaching Mattermost posts as comments to Jira issues in github.com/mattermost/mattermost-server
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server/v6 | 0, 0 |
| github.com | mattermost/mattermost/server/v8 | 0, 0 |
| github.com | mattermost/mattermost-server/v5 | 0, 0 |
| github.com | mattermost/mattermost-server | 11.0.1+incompatible, 11.1.0+incompatible, 10.11.0+incompatible |
Timeline
- Feb 26, 2026 CVE Published
- Feb 26, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-fmqf-pmcm-8cx9 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-13767 advisory
- https://mattermost.com/security-updates url
- https://github.com/mattermost/mattermost/commit/b57c297c6d7ae6812d85e32a625806ac9555deee fix
- https://github.com/mattermost/mattermost/pull/34551 fix