{"id":"CVE-2023-1774","aliases":["BIT-mattermost-2023-1774","GHSA-9hj7-v56g-rhf6"],"url":"https://o3.security/vulnerability/CVE-2023-1774","summary":"Unauthorized email invite to a private channel","details":"When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.\n\n\n","published":"2023-03-31T11:14:00.954Z","modified":"2026-08-12T03:51:30.451966707Z","cvss":{"score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.1.6"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.7.2"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","fixedVersion":"7.1.6"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","fixedVersion":"7.1.6"},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","fixedVersion":"7.1.6"}],"fix":null,"references":[{"type":"WEB","url":"https://mattermost.com/security-updates/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1774.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1774"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:30.451966707Z"}}