GO-2025-4133
Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server
Quick fix
GO-2025-4133 — github.com/mattermost/mattermost-server: upgrade to the fixed version with the command below.
go get github.com/mattermost/mattermost-server@v10.5.12+incompatibleDetails
Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 before v8.0.0-20250905150616-ba86dfc5876b6.
Are you affected?
Enter the version of the package you're using.
Affected packages
10.5.0+incompatibleFixed in: 10.5.12+incompatiblego get github.com/mattermost/mattermost-server@v10.5.12+incompatible0No fixed version published yet for github.com/mattermost/mattermost-server/v5 (go modules). Pin to a known-safe version or switch to an alternative.
0No fixed version published yet for github.com/mattermost/mattermost-server/v6 (go modules). Pin to a known-safe version or switch to an alternative.
0No fixed version published yet for github.com/mattermost/mattermost/server/v8 (go modules). Pin to a known-safe version or switch to an alternative.
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[WEB]
- https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149[WEB]
- https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5[WEB]
- https://github.com/mattermost/mattermost/pull/33835[WEB]
- https://github.com/mattermost/mattermost/pull/33905[WEB]
- https://mattermost.com/security-updates[WEB]