yes, there are professional third party cybersecurity auditors you can hire, but I doubt anyone here would ever need them.

Please people, stop being paranoid about your security. close up all unnecessary ports, and that’s what you can do on your end. whatever else, if the service binding to an open port has security vulnerabilities you don’t know, the project team may very well be unaware of it either, and there’s nothing you could do.

also, if you have multiple users using your service, then it’s their password strength that you should be worrying the most, not your infrastructure.