CVE-2023-53892: Blackcat-CMS Blackcat CMS

High severity, CVSS 7.2. EPSS: 0.9% chance of exploitation in the next 30 days.

Blackcat CMS 1.4 contains a remote code execution vulnerability that allows authenticated administrators to upload malicious PHP files through the jquery plugin manager. Attackers can upload a zip file with a PHP shell script and execute arbitrary system commands by accessing the uploaded plugin's PHP file with a 'code' parameter.

Affected products

• Blackcat-CMS Blackcat CMS: version 1.4 only

Published 2025-12-15. Last modified 2026-06-17.