CVE-2025-69906: Monstra CMS

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Monstra CMS v3.0.4 contains an arbitrary file upload vulnerability in the Files Manager plugin. The application relies on blacklist-based file extension validation and stores uploaded files directly in a web-accessible directory. Under typical server configurations, this can allow an attacker to upload files that are interpreted as executable code, resulting in remote code execution.

Affected products

• Monstra Monstra CMS: version 3.0.4 only

Published 2026-02-05. Last modified 2026-06-17.