VDB
GO-2025-4133
GO-2025-4133
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server
Risk Scores
CVSS v4.0
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/v5 | 0, 0 |
| github.com | mattermost/mattermost-server | 10.5.0+incompatible, 10.11.0+incompatible, 10.5.0+incompatible |
| github.com | mattermost/mattermost-server/v6 | 0, 0 |
| github.com | mattermost/mattermost/server/v8 | 0, 0 |
Timeline
- Nov 25, 2025 CVE Published
- Mar 3, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-9hh7-6558-qfp2 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-55074 advisory
- https://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52 url
- https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149 url
- https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5 url
- https://github.com/mattermost/mattermost/pull/33835 url
- https://github.com/mattermost/mattermost/pull/33905 url
- https://mattermost.com/security-updates url