I have to admit, I giggled each time I saw those tickets... we've only had this done to us like 4-5 times... but each time, they were never able to get anything into our billing system.
It delights me because I like the feeling of being a smug ******* that made damn sure that there weren't many ways of getting into our system.
Likewise, nothing was affected, but I quad-checked just in case and had others check as well... all good.
Pretty sure with my habit of upgrading a month after an update's been released has helped keep it safe. Though, when I heard of the exploit, I immediately updated after that, so I was pretty safe anyway at that point.