{"cve":"CVE-2023-6927","nvd":{"published":"2023-12-18T23:15:10.027","modified":"2026-09-22T04:17:56.923","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601"],"references":["https://access.redhat.com/errata/RHSA-2024:0094","https://access.redhat.com/errata/RHSA-2024:0095","https://access.redhat.com/errata/RHSA-2024:0096","https://access.redhat.com/errata/RHSA-2024:0097","https://access.redhat.com/errata/RHSA-2024:0098"],"products":["redhat:keycloak","redhat:single_sign-on"],"source":"nvd","synced_at":"2026-10-19T21:42:34.585441961+00:00"},"epss":{"cve":"CVE-2023-6927","score":0.01109,"percentile":0.65888,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9vm7-v8wj-3fqw","url":"https://osv.dev/vulnerability/GHSA-9vm7-v8wj-3fqw","summary":"keycloak-core: open redirect via \"form_post.jwt\" JARM response mode","modified":"2026-09-10T03:50:09.322217671Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-core","purl":"pkg:maven/org.keycloak/keycloak-core","ranges":["<23.0.4"],"fixed":["23.0.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}