{"id":"CVE-2021-22896","aliases":["BIT-nextcloud-2021-22896","EUVD-2021-10028","GHSA-jmgp-77jq-fjp3"],"status":"published","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00988,"percentile":0.62904,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-862"],"published":"2021-06-11T15:49:38Z","modified":"2026-10-24T10:50:40Z","fixes":[{"ecosystem":"Bitnami","package":"nextcloud","fixed_in":["1.9.5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"nextcloud","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.9.5"}]}]}],"products":[{"vendor":"nextcloud","product":"nextcloud"}],"references":[{"url":"https://hackerone.com/reports/1129996","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jmgp-77jq-fjp3","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/nextcloud/mail/pull/4864","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/nextcloud/mail/releases/tag/v1.9.5","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22896","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-22896","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","status":"published","published":"2021-06-11T15:49:38Z","modified":"2024-08-03T18:58:25.923Z","cwes":["CWE-862"],"updated_at":"2026-11-02T14:32:57.701381Z"}],"euvd":[{"id":"EUVD-2021-10028","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","status":"published","published":"2021-06-11T15:49:38Z","modified":"2024-08-03T18:58:25Z","updated_at":"2026-11-03T03:25:01.154097Z"}],"nvd":[{"id":"CVE-2021-22896","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","status":"published","published":"2021-06-11T16:15:10.887Z","modified":"2026-06-17T03:37:58.403Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:06:54.439974Z"}],"osv":[{"id":"CVE-2021-22896","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","status":"published","published":"2021-06-11T16:15:10.887Z","modified":"2026-10-24T10:50:40.865633995Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.367807Z"},{"id":"BIT-nextcloud-2021-22896","description":"Nextcloud Mail before 1.9.5 suffers from improper access control due to a missing permission check allowing other authenticated users to create mail aliases for other users.","status":"published","published":"2026-07-12T23:47:36.339Z","modified":"2026-09-08T08:48:15.994636877Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}