{"id":"CVE-2023-27266","aliases":["BIT-mattermost-2023-27266","EUVD-2023-31044","GHSA-cxwh-9cmm-77cp"],"status":"published","title":"Disclosure of team owner email address when when accessing the teams API","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.","severity":{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00526,"percentile":0.45051,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200"],"published":"2023-02-27T14:46:28Z","modified":"2026-10-28T02:31:15Z","fixes":[{"ecosystem":"Bitnami","package":"mattermost","fixed_in":["7.7.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mattermost","ranges":[{"type":"SEMVER","events":[{"introduced":"5.12.0"},{"fixed":"7.7.0"}]}]}],"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-2023-27266","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-cxwh-9cmm-77cp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27266.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-27266","title":"Disclosure of team owner email address when when accessing the teams API","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.\n\n\n","status":"published","published":"2023-02-27T14:46:28.88Z","modified":"2024-12-06T23:06:25.577Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:35:26.63732Z"}],"euvd":[{"id":"EUVD-2023-31044","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.\n\n\n","status":"published","published":"2023-02-27T14:46:28Z","modified":"2024-12-06T23:06:25Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T00:04:38.652605Z"}],"ghsa":[{"id":"GHSA-cxwh-9cmm-77cp","title":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api...","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.","status":"published","published":"2023-02-27T15:30:21Z","modified":"2023-03-15T05:06:24Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:54:20.892008Z"}],"nvd":[{"id":"CVE-2023-27266","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.\n\n\n","status":"published","published":"2023-02-27T15:15:12.067Z","modified":"2026-06-17T05:44:41.627Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:07:47.623983Z"}],"osv":[{"id":"CVE-2023-27266","title":"Disclosure of team owner email address when when accessing the teams API","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.\n\n\n","status":"published","published":"2023-02-27T14:46:28.88Z","modified":"2026-10-28T02:31:15.100215117Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:44:31.135751Z"},{"id":"BIT-mattermost-2023-27266","description":"Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams  API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.","status":"published","published":"2024-03-06T11:01:23.774Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}