CVE-2021-22950: Concretecms Concrete CMS

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Concrete CMS prior to 8.5.6 had a CSFR vulnerability allowing attachments to comments in the conversation section to be deleted.Credit for discovery: "Solar Security Research Team"

Affected products

• Concretecms Concrete CMS: before 8.5.6 (fixed in 8.5.6)

Published 2021-09-23. Last modified 2026-06-17.