{"id":"CVE-2023-3597","aliases":[],"url":"https://o3.security/vulnerability/CVE-2023-3597","summary":"Keycloak secondary factor bypass in step-up authentication","details":"Keycloak does not correctly validate its client step-up authentication. A password-authed attacker could use this flaw to register a false second auth factor, alongside the existing one, to a targeted account. The second factor then permits step-up authentication.","published":"2024-04-17T17:31:50Z","modified":"2026-09-10T03:50:11.176672050Z","cvss":{"score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"22.0.10"},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"24.0.3"}],"fix":{"url":"https://github.com/keycloak/keycloak/commit/aa634aee882892960a526e49982806e103c8a432","label":"keycloak/keycloak@aa634ae"},"references":[{"type":"WEB","url":"https://github.com/keycloak/keycloak/security/advisories/GHSA-4f53-xh3v-g8x4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3597"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/aa634aee882892960a526e49982806e103c8a432"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2024:1866"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2024:1867"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2024:1868"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2023-3597"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2221760"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:50:11.176672050Z"}}