A very recently publicized vulnerability in JetPack has been patched in the latest version. As a result of this update, we’ll be updating all installs of JetPack on our systems to the latest version. You can read more here:
It’s important to note that we’ve been working with the team at Automattic and other hosting providers to block this type of attack so things are secure. However, updating will be the most secure course of action.
There is no action needed on your part, but if you have questions, please feel free to email firstname.lastname@example.org.