The "google.com vulnerability" has nothing to do with google search. It is just another one of many mechanisms a hacker could use on an already-compromised website to get that website to load their malicious script. The key is they already need to have compromised someone's website, and get you to load that website, and get you to enter sensitive information (like payment info) on that website, in order for them to do anything with it. If this "google.com vulnerability" was to be fixed, they could just use a different mechanism to load their malicious script.