CVE-2023-44763: Concretecms Concrete CMS

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

Concrete CMS v9.2.1 is affected by an Arbitrary File Upload vulnerability via a Thumbnail file upload, which allows Cross-Site Scripting (XSS). NOTE: the vendor's position is that a customer is supposed to know that "pdf" should be excluded from the allowed file types, even though pdf is one of the allowed file types in the default configuration.

Affected products

• Concretecms Concrete CMS: version 9.2.1 only

Published 2023-10-10. Last modified 2026-06-17.