Don't use a server using MariaDB, ImageMagick, OpenSSH, aaPanel, OpenDMARC, OpenPanel, cPanel, +more...
They are just some of the latest CVE's in the past 30 days that could allow remote code execution if you don't keep them up2date.
All EOL OS'es that have no security updates are a hacker's paradise right now also, e.g. CentOS 7.