: TLS certificates generated natively by the server began using random serial numbers to mitigate collision risks.
If you are running this version, it is highly recommended to upgrade to the modern FileZilla Server (1.x or 2.x), which features improved security, encryption, and an updated codebase. filezilla server 0.9.60 beta exploit github
Version 0.9.60 was released to address specific security flaws found in earlier iterations, notably improving the handling of TLS and peer IP verification. Security Fixes in 0.9.60 IP Matching : TLS certificates generated natively by the server