From time to time hosting control panels (Such as Plesk) get updated by their creators. Those updates may often include patches to critical vulnerabilities, so its a good idea to keep track of those.
We try to keep our customers informed. One example is a recent notification from Parallels affecting some older versions of Plesk.
However it is a great idea to keep track yourself. We recommend signing up to the relevant announcement channels. Some handy examples are below.
If you have questions at any time about enhancing the security of anything to do with your server please do get in touch with us