CVE-2025-55074
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >=10.11.0,<10.11.4 | 10.11.4 |
| Go | github.com/mattermost/mattermost-server | >=10.5.0,<10.5.12 | 10.5.12 |
| Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250905150616-ba86dfc5876b6 | 8.0.0-20250905150616-ba86dfc5876b6 |
| Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible,<10.11.4+incompatible | 10.5.12+incompatible |
| Go | github.com/mattermost/mattermost-server/v5 | | |
| Go | github.com/mattermost/mattermost-server/v6 | | |
| Go | github.com/mattermost/mattermost/server/v8 | | |
References
- 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
- https://github.com/advisories/GHSA-9hh7-6558-qfp2
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
Verify integrity in audit chain (admin only). AS-IS.