{"id":"CVE-2018-1256","aliases":["GHSA-q4q2-93pw-qwgf"],"url":"https://o3.security/vulnerability/CVE-2018-1256","summary":"Issuer validation regression in Spring Cloud SSO Connector","details":"Spring Cloud SSO Connector, version 2.1.2, contains a regression which disables issuer validation in resource servers that are not bound to the SSO service. In PCF deployments with multiple SSO service plans, a remote attacker can authenticate to unbound resource servers which use this version of the SSO Connector with tokens generated from another service plan.","published":"2018-05-07T16:22:00.217Z","modified":"2026-07-08T17:15:12.471444Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.pivotal.spring.cloud:spring-cloud-sso-connector","fixedVersion":"2.1.3.RELEASE"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://pivotal.io/security/cve-2018-1256"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:15:12.471444Z"}}