low3.0
CVE-2025-55074
Mattermost allows other users to determine when users had read channels via channel member objects
Impact
Mattermost versions 10.11.x <= 10.11.3, and 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.4 | 10.11.4 |
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250905150616-ba86dfc5876b6 | 8.0.0-20250905150616-ba86dfc5876b6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.5.0 before 10.5.12 from 10.11.0 before 10.11.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-9hh7-6558-qfp2
- https://nvd.nist.gov/vuln/detail/CVE-2025-55074
- https://github.com/mattermost/mattermost/pull/33835
- https://github.com/mattermost/mattermost/pull/33905
- https://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52
- https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149
- https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5