{"id":"CVE-2019-20890","aliases":["EUVD-2019-11427","GHSA-vxm4-w9mc-pm8x"],"status":"published","title":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address...","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00775,"percentile":0.56035,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2020-06-19T16:44:59Z","modified":"2026-10-24T10:31:04Z","products":[{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates/","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-20890"},{"url":"https://github.com/advisories/GHSA-vxm4-w9mc-pm8x"}],"sources":{"cve":[{"id":"CVE-2019-20890","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","status":"published","published":"2020-06-19T16:44:59Z","modified":"2024-08-05T02:53:09.474Z","updated_at":"2026-11-02T14:20:17.431882Z"}],"euvd":[{"id":"EUVD-2019-11427","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","status":"published","published":"2020-06-19T16:44:59Z","modified":"2024-08-05T02:53:09Z","updated_at":"2026-11-03T02:40:20.270172Z"}],"ghsa":[{"id":"GHSA-vxm4-w9mc-pm8x","title":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address...","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","status":"published","published":"2022-05-24T17:21:15Z","modified":"2023-01-29T05:03:07Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:45:14.655741Z"}],"nvd":[{"id":"CVE-2019-20890","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","status":"published","published":"2020-06-19T17:15:14.067Z","modified":"2026-06-17T02:31:23.347Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:05:47.558959Z"}],"osv":[{"id":"CVE-2019-20890","description":"An issue was discovered in Mattermost Server before 5.7. It allows a bypass of e-mail address discovery restrictions.","status":"published","published":"2020-06-19T17:15:14.067Z","modified":"2026-10-24T10:31:04.711038352Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:12.363788Z"}]}}