{"id":"CVE-2018-15801","aliases":["GHSA-27xw-p8v6-9jjr"],"url":"https://o3.security/vulnerability/CVE-2018-15801","summary":"Spring Security vulnerable to Authorization Bypass","details":"Spring Security versions 5.1.x prior to 5.1.2 contain an authorization bypass vulnerability during JWT issuer validation. In order to be impacted, the same private key for an honest issuer and a malicious user must be used when signing JWTs. In that case, a malicious user could fashion signed JWTs with the malicious issuer URL that may be granted for the honest issuer.","published":"2018-12-19T22:29:00.593Z","modified":"2026-07-08T17:15:45.717504Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"5.1.2"},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-oauth2-jose","fixedVersion":"5.1.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://pivotal.io/security/cve-2018-15801"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:15:45.717504Z"}}