If an old server absolutely cannot be decommissioned due to legacy dependencies: Place it behind a strict firewall.
The most effective remediation strategy is to upgrade to the latest stable version of FileZilla Server (Version 1.x or higher). The 1.x architecture was rebuilt from scratch, eliminating the legacy code base responsible for 0.9.x vulnerabilities. 2. Implement Network Segmentation filezilla server 0.9.60 beta exploit github