{"id":"CVE-2018-1256","aliases":["EUVD-2022-4881","GHSA-q4q2-93pw-qwgf"],"status":"published","title":"Issuer validation regression in Spring Cloud SSO Connector","description":"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.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01578,"percentile":0.75654,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2018-05-07T15:00:00Z","modified":"2026-10-24T10:30:21Z","fixes":[{"ecosystem":"Maven","package":"io.pivotal.spring.cloud:spring-cloud-sso-connector","fixed_in":["2.1.3.RELEASE"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.pivotal.spring.cloud:spring-cloud-sso-connector","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.2.RELEASE"},{"last_affected":"2.1.2.RELEASE"},{"fixed":"2.1.3.RELEASE"}]}],"versions":["2.1.2.RELEASE"]},{"source":"osv","ecosystem":"Maven","package":"io.pivotal.spring.cloud:spring-cloud-sso-connector","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.2.RELEASE"},{"fixed":"2.1.3.RELEASE"}]}],"versions":["2.1.2.RELEASE"]}],"products":[{"vendor":"pivotal","product":"spring cloud sso connector"},{"vendor":"vmware","product":"spring_cloud_sso_connector"}],"references":[{"url":"https://pivotal.io/security/cve-2018-1256","tags":["x_refsource_CONFIRM","x_transferred","Mitigation","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-1256","tags":["advisory"]},{"url":"https://github.com/pivotal-cf/spring-cloud-sso-connector/commit/ef647a2acf2363c6018e8543d665ac8862593372","tags":["web"]},{"url":"https://github.com/advisories/GHSA-q4q2-93pw-qwgf"}],"sources":{"cve":[{"id":"CVE-2018-1256","description":"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.","status":"published","published":"2018-05-07T15:00:00Z","modified":"2024-09-17T01:06:26.892Z","updated_at":"2026-11-02T14:35:09.139955Z"}],"euvd":[{"id":"EUVD-2022-4881","description":"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.","status":"published","published":"2018-05-07T15:00:00Z","modified":"2024-09-17T01:06:26Z","updated_at":"2026-11-03T00:28:52.69419Z"}],"ghsa":[{"id":"GHSA-q4q2-93pw-qwgf","title":"Issuer validation regression in Spring Cloud SSO Connector","description":"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.\n\n### Mitigation\nUsers of affected versions should apply the following mitigation:\n* Releases that have fixed this issue include:\u003c/p\u003e\u003cul\u003e\u003cli\u003eSpring Cloud SSO Connector: 2.1.3\u003c/li\u003e\u003c/ul\u003e\n* Alternatively, you can perform \u003cu\u003eone\u003c/u\u003e of the following workarounds:\u003c/p\u003e\u003cul\u003e\u003cli\u003eBind your resource server to the SSO service plan via a service instance binding\u003c/li\u003e\u003cli\u003eSet “sso.connector.cloud.available=true” within your Spring application properties\u003c/li\u003e\u003c/ul\u003e\n\n","status":"published","published":"2022-05-13T01:07:05Z","modified":"2024-03-04T20:49:00Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:37:39.730152Z"}],"nvd":[{"id":"CVE-2018-1256","description":"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.","status":"published","published":"2018-05-07T16:22:00.217Z","modified":"2026-06-17T01:50:49.833Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:26.098615Z"}],"osv":[{"id":"CVE-2018-1256","description":"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.","status":"published","published":"2018-05-07T16:22:00.217Z","modified":"2026-10-24T10:30:21.336296947Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"GHSA-q4q2-93pw-qwgf","title":"Issuer validation regression in Spring Cloud SSO Connector","description":"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.\n\n### Mitigation\nUsers of affected versions should apply the following mitigation:\n* Releases that have fixed this issue include:\u003c/p\u003e\u003cul\u003e\u003cli\u003eSpring Cloud SSO Connector: 2.1.3\u003c/li\u003e\u003c/ul\u003e\n* Alternatively, you can perform \u003cu\u003eone\u003c/u\u003e of the following workarounds:\u003c/p\u003e\u003cul\u003e\u003cli\u003eBind your resource server to the SSO service plan via a service instance binding\u003c/li\u003e\u003cli\u003eSet “sso.connector.cloud.available=true” within your Spring application properties\u003c/li\u003e\u003c/ul\u003e\n\n","status":"published","published":"2022-05-13T01:07:05Z","modified":"2024-03-04T20:48:59Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:54.055966Z"}]}}