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Medium · 6.3 CVE-2026-7881 EUVD-2026-31355GHSA-chfm-cm6h-q5x7

Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block

Published May 21, 2026 · Updated May 22, 2026 · Assigned by ConcreteCMS

Description

Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference (IDOR) in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Madani for reporting.

Affected products

VendorProductAffectedFixed
Concrete CMS Concrete CMS — —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist concrete5/concrete5 < 9.5.1 9.5.1 GHSA-chfm-cm6h-q5x7

References