Go/github.com/mattermost/mattermost/server/v8 CVE-2025-55074: low 3, EPSS 0.18%

Mattermost allows other users to determine when users had read channels via channel member objects

Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250905150616-ba86dfc5876b6 or later.

go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250905150616-ba86dfc5876b6

Affected

Fixed versions

Sources

• osv: GHSA-9hh7-6558-qfp2#Go/github.com/mattermost/mattermost/server/v8
• 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

CVE-2025-55074 · published 2025-11-18T18:32:52Z · modified 2025-11-27T08:52:50.122365Z · JSON