CVE-2025-55074
LOW3.0EPSS 0.02%Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server
Published: 11/18/2025Modified: 3/3/2026
Description
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.
Affected packages (6)
- Go/github.com/mattermost/mattermost-server>= 10.11.0, < 10.11.4
- Go/github.com/mattermost/mattermost-server>= 10.5.0+incompatible, < 10.5.12+incompatible, >= 10.11.0+incompatible, < 10.11.4+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250905150616-ba86dfc5876b6
- Go/github.com/mattermost/mattermost/server/v8from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N |
References (9)
- ADVISORYhttps://github.com/advisories/GHSA-9hh7-6558-qfp2
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-55074
- PATCHhttps://github.com/mattermost/mattermost
- WEBhttps://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52
- WEBhttps://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149
- WEBhttps://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5
- WEBhttps://github.com/mattermost/mattermost/pull/33835
- WEBhttps://github.com/mattermost/mattermost/pull/33905
- WEBhttps://mattermost.com/security-updates