{"id":"CVE-2023-0657","aliases":["GHSA-7fpj-9hr8-28vh"],"url":"https://o3.security/vulnerability/CVE-2023-0657","summary":"Keycloak: impersonation via logout token exchange","details":"A flaw was found in Keycloak. This issue occurs due to improperly enforcing token types when validating signatures locally. This could allow an authenticated attacker to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.","published":"2024-11-17T10:19:03.717Z","modified":"2026-08-12T03:51:41.438988126Z","cvss":{"score":3.4,"severity":"LOW","vector":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N"},"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":null,"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1867"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1868"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-0657"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0657.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-0657"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2166728"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/security/advisories/GHSA-7fpj-9hr8-28vh"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:41.438988126Z"}}