{"id":"CVE-2026-81907","title":"Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express \"Clear Entries\" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforc…","summary":"Concrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express \"Clear Entries\" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforc…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","cwe":["CWE-352"],"vendor":"concretecms","product":"concrete_cms","affected":["concrete_cms < 9.5.3"],"patched":["concrete_cms 9.5.3"],"published":"2026-09-11","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:02:32.330","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81907","references":[{"url":"https://documentation.concretecms.org/developers/introduction/version-history/953-release-notes","label":"ff5b8ace-8b95-4078-9743-eac1ca5451de"}],"tags":["nvd","cve.org"],"epss":0.00137,"epssPercentile":0.03112,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T12:51:03.281243Z"},"scores":{"nvd":7.1,"cna":6.1},"ingestedAt":"2026-09-14T15:23:07.429Z","slug":"CVE-2026-81907","body":"## Overview\n\nConcrete CMS 9.5.2 and below is vulnerable to Cross-Site Request Forgery (CSRF) in the Express \"Clear Entries\" function (POST /index.php/dashboard/system/express/entities/delete_entries) because the controller records but does not enforce a failed CSRF token check, allowing the destructive operation to proceed when the token is missing or invalid. A remote unauthenticated attacker can force an authenticated administrator who visits an attacker-controlled page to permanently delete all entries belonging to an attacker-selected Express entity on a web application to which the administrator is currently authenticated. Because the default Contact Express object ships with a fixed entity UUID, the target identifier can be obtained without dashboard access. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Pratik Zanjurne for reporting.\n\n## Affected\n\n- `concrete_cms < 9.5.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `concrete_cms 9.5.3`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210366,"id":"CVE-2026-81907","ts":1790283159826,"field":"cvss","old":"6.1","new":"7.1"},{"seq":210365,"id":"CVE-2026-81907","ts":1790283159826,"field":"severity","old":"medium","new":"high"}]}