{"id":"CVE-2023-1774","aliases":["BIT-mattermost-2023-1774","EUVD-2023-0969","GHSA-9hj7-v56g-rhf6"],"status":"published","title":"Unauthorized email invite to a private channel","description":"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.","severity":{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00317,"percentile":0.24862,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-862"],"published":"2023-03-31T11:14:00Z","modified":"2026-10-28T02:30:34Z","fixes":[{"ecosystem":"Go","package":"github.com/mattermost/mattermost-server","fixed_in":["7.1.6","7.7.2"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v5","fixed_in":["7.1.6"],"sources":["ghsa","osv"]},{"ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","fixed_in":["7.1.6"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["7.1.6"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.3.0"},{"last_affected":"4.10.10"},{"fixed":"7.1.6"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.7.0"},{"last_affected":"7.7.1"},{"fixed":"7.7.2"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"last_affected":"7.1.5"},{"fixed":"7.1.6"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"last_affected":"5.39.3"},{"fixed":"7.1.6"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"last_affected":"6.7.2"},{"fixed":"7.1.6"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.1.6"}]},{"type":"SEMVER","events":[{"introduced":"7.7.1"},{"last_affected":"7.7.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"introduced":"3.3.0"},{"fixed":"7.1.6"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"introduced":"7.7.0"},{"fixed":"7.7.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"introduced":"7.1.0"},{"fixed":"7.1.6"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v5","ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0"},{"fixed":"7.1.6"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"SEMVER","events":[{"introduced":"6.0.0"},{"fixed":"7.1.6"}]}]}],"products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates/","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1774","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-9hj7-v56g-rhf6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1774.json","tags":["advisory"]},{"url":"https://mattermost.com/security-updates","tags":["web"]},{"url":"github.com/mattermost/mattermost-server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-1774","title":"Unauthorized email invite to a private channel","description":"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","status":"published","published":"2023-03-31T11:14:00.954Z","modified":"2024-12-06T23:05:52.973Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:35:31.657022Z"}],"euvd":[{"id":"EUVD-2023-0969","description":"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","status":"published","published":"2023-03-31T11:14:00Z","modified":"2024-12-06T23:05:52Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:38.652605Z"}],"ghsa":[{"id":"GHSA-9hj7-v56g-rhf6","title":"Mattermost fails to properly authentication inviter's permissions to private channel","description":"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[Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00137","status":"published","published":"2023-03-31T12:30:16Z","modified":"2023-04-15T05:07:52Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:36:50.476488Z"}],"nvd":[{"id":"CVE-2023-1774","description":"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","status":"published","published":"2023-03-31T12:15:06.65Z","modified":"2026-06-17T05:28:43.777Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:07:51.883939Z"}],"osv":[{"id":"CVE-2023-1774","title":"Unauthorized email invite to a private channel","description":"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","status":"published","published":"2023-03-31T11:14:00.954Z","modified":"2026-10-28T02:30:34.380682732Z","cvss":[{"version":"3.1","score":4.2,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:44:30.334753Z"},{"id":"GHSA-9hj7-v56g-rhf6","title":"Mattermost fails to properly authentication inviter's permissions to private channel","description":"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[Issue Identifier](https://mattermost.com/security-updates/): MMSA-2023-00137","status":"published","published":"2023-03-31T12:30:16Z","modified":"2023-12-06T01:02:47.844829Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:46:43.875515Z"},{"id":"BIT-mattermost-2023-1774","description":"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.","status":"published","published":"2024-03-06T11:02:41.595Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}