{"id":"CVE-2023-6927","published":"2023-12-18T22:59:07Z","modified":"2026-09-22T03:36:47Z","title":"Keycloak: open redirect via \"form_post.jwt\" jarm response mode","vendor":"Red Hat","product":"Red Hat build of Keycloak 22","tier":"tail","description":{"text":"A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode \"form_post.jwt\" which could be used to bypass the security patch implemented to address CVE-2023-6134.","provenance":"source","from":"CVE.org"},"cvss":{"score":4.6,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.01109,"percentile":0.65765,"provenance":"source"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2024:0094","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0095","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0096","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0097","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0098","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0100","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0101","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0798","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0799","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0800","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0801","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0804","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2023-6927","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2255027","tags":["issue-tracking","x_refsource_REDHAT"]}],"priority":{"score":16.4,"factors":[{"name":"EPSS percentile","points":13.15},{"name":"CVSS severity","points":3.22}]},"vendorSlug":"red-hat","affectedVersions":[{"vendor":"Red Hat","product":"Red Hat build of Keycloak 22","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 7","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 7","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 8","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 8","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 9","versions":["all versions"]},{"vendor":"Red Hat","product":"Red Hat Single Sign-On 7.6 for RHEL 9","versions":["all versions"]},{"vendor":"Red Hat","product":"RHEL-8 based Middleware Containers","versions":["all versions"]},{"vendor":"Red Hat","product":"RHEL-8 based Middleware Containers","versions":["all versions"]}],"affected":[{"ecosystem":"Maven","package":"org.keycloak:keycloak-core","vulnerableRanges":["<23.0.4"],"patched":["23.0.4"],"from":["GHSA-9vm7-v8wj-3fqw"],"provenance":"source"}],"euvd":{"id":"EUVD-2024-0318","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-red-hat-build-of-keycloak-22-cve-2020-10748","parents":[{"from":"CVE-2023-6134","to":"CVE-2023-6927","relation":"bypass","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"bypass","quote":"This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode \"form_post.jwt\" which could be used to bypass the security patch implemented to address CVE-2023-6134.","from":"CVE.org","in":"CVE-2023-6927"}]}]}}