Go/github.com/mattermost/mattermost/server/v8 CVE-2025-3228: medium 4.3, EPSS 0.29%

Mattermost allows an unauthorized Guest user access to Playbook in github.com/mattermost/mattermost-server

Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250520060012-d0380305ef7a or later.

go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250520060012-d0380305ef7a

Affected

Fixed versions

Sources

• osv: GO-2025-3771#Go/github.com/mattermost/mattermost/server/v8
• nvd: CVE-2025-3228
• https://github.com/advisories/GHSA-4578-6gjh-f2jm
• https://mattermost.com/security-updates

CVE-2025-3228 · published 2025-07-28T19:57:13Z · modified 2026-03-03T04:57:20.979939Z · JSON