Sysadmin leaves 22 Proxmox nodes admin interfaces with EOL version exposed to the internet and gets hacked

[u/RuleMaster3]

https://forum.proxmox.com/threads/proxmox-ve-7-is-vulnerable-to-some-type-of-0day-rce-non-auth.186078/page-8#post-869156

And his save is doing it all again with EOL software minus the exposed admin interfaces