{"id":"CVE-2021-4133","aliases":["EUVD-2022-0514","GHSA-83x4-9cwr-5487","RHSA-2021:5218","RHSA-2021:5219","RHSA-2022:0151","RHSA-2022:0152"],"status":"published","title":"Improper Authorization in Keycloak","description":"A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01373,"percentile":0.72181,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2022-01-06T18:32:58Z","modified":"2026-10-20T10:54:58Z","fixes":[{"ecosystem":"Maven","package":"org.keycloak:keycloak-services","fixed_in":["15.1.1"],"sources":["ghsa","osv"]},{"ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak","fixed_in":["0:15.0.2-3.redhat_00002.1.el7sso"],"sources":["osv"]},{"ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak-server","fixed_in":["0:15.0.2-3.redhat_00002.1.el7sso"],"sources":["osv"]},{"ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak","fixed_in":["0:15.0.2-3.redhat_00002.1.el8sso"],"sources":["osv"]},{"ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak-server","fixed_in":["0:15.0.2-3.redhat_00002.1.el8sso"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.keycloak:keycloak-services","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"15.1.1"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.keycloak:keycloak-services","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"15.1.1"}]}],"versions":["1.0-alpha-1","1.0-alpha-1-12062013","1.0-alpha-2","1.0-alpha-3","1.0-alpha-4","1.0-beta-1","1.0-beta-1-20150521","1.0-beta-1-20150523","1.0-beta-2","1.0-beta-3","1.0-beta-4","1.0-final","1.0-rc-1","1.0-rc-2","1.0.1.Final","1.0.2.Final","1.0.3.Final","1.0.4.Final","1.0.5.Final","1.1.0.Beta1","1.1.0.Beta2","1.1.0.Final","1.1.1.Final","1.2.0.Beta1","1.2.0.CR1","1.2.0.Final","1.3.0.Final","1.3.1.Final","1.4.0.Final","1.5.0-Final","1.5.0.Final","1.5.1.Final","1.6.0.Final","1.6.1.Final","1.7.0.CR1","1.7.0.Final","1.8.0.Alpha1","1.8.0.CR1","1.8.0.CR2","1.8.0.CR3","1.8.0.Final","1.8.1.Final","1.9.0.CR1","1.9.0.Final","1.9.1.Final","1.9.2.Final","1.9.3.Final","1.9.4.Final","1.9.5.Final","1.9.7.Final","1.9.8.Final","10.0.0","10.0.1","10.0.2","11.0.0","11.0.1","11.0.2","11.0.3","12.0.0","12.0.1","12.0.2","12.0.3","12.0.4","13.0.0","13.0.1","14.0.0","15.0.0","15.0.1","15.0.2","15.1.0","2.0.0.CR1","2.0.0.Final","2.1.0.CR1","2.1.0.Final","2.2.0.CR1","2.2.0.Final","2.2.1.Final","2.3.0.CR1","2.3.0.Final","2.4.0.CR1","2.4.0.Final","2.5.0.CR1","2.5.0.Final","2.5.1.Final","2.5.4.Final","2.5.5.Final","3.0.0.CR1","3.0.0.Final","3.1.0.CR1","3.1.0.Final","3.2.0.CR1","3.2.0.Final","3.2.1.Final","3.3.0.CR1","3.3.0.CR2","3.3.0.Final","3.4.0.CR1","3.4.0.Final","3.4.1.CR1","3.4.1.Final","3.4.2.Final","3.4.3.Final","4.0.0.Beta1","4.0.0.Beta2","4.0.0.Beta3","4.0.0.Final","4.1.0.Final","4.2.0.Final","4.2.1.Final","4.3.0.Final","4.4.0.Final","4.5.0.Final","4.6.0.Final","4.7.0.Final","4.8.0.Final","4.8.1.Final","4.8.2.Final","4.8.3.Final","5.0.0","6.0.0","6.0.1","7.0.0","7.0.1","8.0.0","8.0.1","8.0.2","9.0.0","9.0.2","9.0.3"]},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.2-3.redhat_00002.1.el7sso"}]}]},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.2-3.redhat_00002.1.el7sso"}]}]},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.2-3.redhat_00002.1.el8sso"}]}]},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.2-3.redhat_00002.1.el8sso"}]}]},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.4-1.redhat_00001.1.el7sso"}]}],"bundled":4},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el7","package":"rh-sso7-keycloak-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.4-1.redhat_00001.1.el7sso"}]}],"bundled":4},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.4-1.redhat_00001.1.el8sso"}]}],"bundled":4},{"source":"osv","ecosystem":"Red Hat:red_hat_single_sign_on:7.5::el8","package":"rh-sso7-keycloak-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:15.0.4-1.redhat_00001.1.el8sso"}]}],"bundled":4}],"products":[{"vendor":"keycloak","product":"keycloak"},{"vendor":"redhat","product":"keycloak"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2033602","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/keycloak/keycloak/issues/9247","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web","article"]},{"url":"https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web","article"]},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["x_refsource_MISC","x_transferred","Not Applicable","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4133","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-83x4-9cwr-5487"},{"url":"https://github.com/keycloak/keycloak","tags":["package"]},{"url":"https://access.redhat.com/errata/RHSA-2021:5218","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.5/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_5218.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-4133","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-4133","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:5219","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_5219.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2022:0151","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1935927","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2007512","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2011190","tags":["report"]},{"url":"https://issues.redhat.com/browse/CIAM-1616","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_0151.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-3827","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3827","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3827","tags":["advisory"]},{"url":"https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-20289","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20289","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20289","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-40690","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-40690","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40690","tags":["advisory"]},{"url":"https://lists.apache.org/thread.html/r8848751b6a5dd78cc9e99d627e74fecfaffdfa1bb615dce827aad633%40%3Cdev.santuario.apache.org%3E","tags":["article"]},{"url":"https://access.redhat.com/errata/RHSA-2022:0152","tags":["advisory"]},{"url":"https://issues.redhat.com/browse/CIAM-1615","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2022/rhsa-2022_0152.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-4133","description":"A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.","status":"published","published":"2022-01-25T19:11:13Z","modified":"2024-08-03T17:16:04.238Z","cwes":["CWE-863"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2022-0514","description":"A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.","status":"published","published":"2022-01-25T19:11:13Z","modified":"2024-08-03T17:16:04Z","updated_at":"2026-11-03T03:25:10.418596Z"}],"ghsa":[{"id":"GHSA-83x4-9cwr-5487","title":"Improper Authorization in Keycloak","description":"A incorrect authorization flaw was found in Keycloak 12.0.0, the flaw allows an attacker with any existing user account to create new default user accounts via the administrative REST API even where new user registration is disabled.","status":"published","published":"2022-01-06T18:32:58Z","modified":"2023-02-03T05:04:06Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:36:41.967989Z"}],"nvd":[{"id":"CVE-2021-4133","description":"A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.","status":"published","published":"2022-01-25T20:15:08.607Z","modified":"2026-06-17T04:19:05.61Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:07:03.821385Z"}],"osv":[{"id":"CVE-2021-4133","description":"A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.","status":"published","published":"2022-01-25T20:15:08.607Z","modified":"2026-10-20T10:54:58.369898863Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.557945Z"},{"id":"GHSA-83x4-9cwr-5487","title":"Improper Authorization in Keycloak","description":"A incorrect authorization flaw was found in Keycloak 12.0.0, the flaw allows an attacker with any existing user account to create new default user accounts via the administrative REST API even where new user registration is disabled.","status":"published","published":"2022-01-06T18:32:58Z","modified":"2026-07-16T03:59:28.131012483Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:46:41.732368Z"},{"id":"RHSA-2021:5218","title":"Red Hat Security Advisory: Red Hat Single Sign-On 7.5.0 security update on RHEL 7","status":"published","published":"2024-09-16T06:57:36Z","modified":"2026-08-05T10:09:50Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2021:5219","title":"Red Hat Security Advisory: Red Hat Single Sign-On security update on RHEL 8","status":"published","published":"2024-09-16T06:57:29Z","modified":"2026-08-05T10:09:51Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2022:0151","title":"Red Hat Security Advisory: Red Hat Single Sign-On 7.5.1 security update on RHEL 7","status":"published","published":"2024-09-16T06:58:05Z","modified":"2026-10-13T10:02:46Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"},{"id":"RHSA-2022:0152","title":"Red Hat Security Advisory: Red Hat Single Sign-On 7.5.1 security update on RHEL 8","status":"published","published":"2024-09-16T06:57:57Z","modified":"2026-10-13T10:02:47Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:09.077222Z"}]}}
