CVE-2023-48653: Concretecms Concrete CMS

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Concrete CMS before 8.5.14 and 9 before 9.2.3 allows Cross Site Request Forgery (CSRF) via ccm/calendar/dialogs/event/delete/submit. An attacker can force an admin to delete events on the site because the event ID is numeric and sequential.

Affected products

• Concretecms Concrete CMS: before 8.5.14 (fixed in 8.5.14); from 9.0.0, before 9.2.3 (fixed in 9.2.3)

Published 2024-02-29. Last modified 2026-06-17.