Go/github.com/mattermost/mattermost/server/v8 CVE-2025-12559: medium 4.3, EPSS 0.22%

Mattermost fails to sanitize team email addresses

Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251015091448-abbf01b9db45 or later.

go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251015091448-abbf01b9db45

Affected

Fixed versions

Sources

• osv: GHSA-4g87-9x45-cx2h
• https://nvd.nist.gov/vuln/detail/CVE-2025-12559
• https://github.com/mattermost/mattermost/pull/34110
• https://github.com/mattermost/mattermost/commit/5d8719042c1807da59ac8a821624eb01152d8495
• https://github.com/mattermost/mattermost/commit/649aee8fa9184ca59bd66022a33b8f8918e413aa
• https://github.com/mattermost/mattermost/commit/7ccb62db7958abd6a4b21a06c5a4f5367a8f8b1f
• https://github.com/mattermost/mattermost/commit/9f54e5cdc3aef412945ff0e6a58338f7b549bdda
• https://github.com/mattermost/mattermost/commit/abbf01b9db45d1850eaf3701ea8362b910193ffd
• https://github.com/mattermost/mattermost
• https://mattermost.com/security-updates

CVE-2025-12559 · published 2025-11-27T18:30:25Z · modified 2025-12-15T21:11:17.085319Z · JSON