CVE-2026-3244: Concretecms Concrete CMS

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

In Concrete CMS below version 9.4.8, A stored cross-site scripting (XSS) vulnerability exists in the search block where page names and content are rendered without proper HTML encoding in search results. This allows authenticated, rogue administrators to inject malicious JavaScript through page names that executes when users search for and view those pages in search results. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks zolpak for reporting

Affected products

• Concretecms Concrete CMS: before 9.4.8 (fixed in 9.4.8)

Published 2026-03-04. Last modified 2026-06-17.