{"id":"CVE-2026-85387","title":"Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to","summary":"Concrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a t…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","cwe":["CWE-613"],"vendor":"concretecms","product":"concrete_cms","affected":["concrete_cms < 9.5.4"],"patched":["concrete_cms 9.5.4"],"published":"2026-09-16","updated":"2026-09-21","sourceUpdated":"2026-09-21T17:51:12.423","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85387","references":[{"url":"https://documentation.concretecms.org/developers/introduction/version-history/954-release-notes","label":"ff5b8ace-8b95-4078-9743-eac1ca5451de"}],"tags":["nvd","cve.org","score-dispute"],"epss":0.00192,"epssPercentile":0.09131,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T17:32:30.974789Z"},"scores":{"nvd":7.1,"cna":2},"ingestedAt":"2026-09-16T18:01:17.463Z","slug":"CVE-2026-85387","body":"## Overview\n\nConcrete CMS before 9.5.4 re-authorized OAuth REST API requests from the bearer token alone and did not re-check the state of the account the token had been issued to. The resource server's authorization validator confirmed only that a token existed, had not expired, and had not been explicitly revoked, and deactivating a user did not revoke that user's outstanding tokens. As a result, a deactivated user retained full access to /ccm/api/1.0/* for the remaining lifetime of any token already issued to them. The same gap applied to accounts that had been deleted or locked pending a forced password reset. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Myq Larson for reporting.\n\n## Affected\n\n- `concrete_cms < 9.5.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `concrete_cms 9.5.4`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208705,"id":"CVE-2026-85387","ts":1790016699730,"field":"cvss","old":"2","new":"7.1"},{"seq":208704,"id":"CVE-2026-85387","ts":1790016699730,"field":"severity","old":"low","new":"high"}]}