{"id":"CVE-2025-6227","aliases":["GHSA-4fwj-8595-wp25","GO-2025-3818"],"url":"https://o3.security/vulnerability/CVE-2025-6227","summary":"Invite token is used as part of the secure communication","details":"Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.","published":"2025-07-18T11:39:46.005Z","modified":"2026-07-15T01:48:51.967529218Z","cvss":{"score":2.2,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"10.5.8"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"9.11.17"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","fixedVersion":"8.0.0-20250612074655-8f8612c63783"}],"fix":null,"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6227.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6227"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:51.967529218Z"}}