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.
{ "nvd_published_at": "2018-12-19T22:29:00Z", "cwe_ids": [ "CWE-345" ], "severity": "HIGH", "github_reviewed": true, "github_reviewed_at": "2020-06-16T20:51:43Z" }