{"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":{"url":"https://github.com/spring-projects/spring-security/commit/c70b65c5df0e170a2d34d812b83db0b7bc71ea25","label":"spring-projects/spring-security@c70b65c"},"references":[{"type":"ADVISORY","url":"https://pivotal.io/security/cve-2018-15801"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-15801"},{"type":"WEB","url":"https://github.com/spring-projects/spring-security/commit/c70b65c5df0e170a2d34d812b83db0b7bc71ea25"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-27xw-p8v6-9jjr"},{"type":"PACKAGE","url":"https://github.com/spring-projects/spring-security"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:15:45.717504Z"}}