Officials in the city of Fond du Lac say that it’s Water Payment Portal for people who pay their water bills online was hacked.
They say they were notified on December 12th by a partner bank. They say the credit card numbers of people who used the system between August and October of this year could be compromised.
They say the only data that was taken was from credit cards.
Officials say there was a known vulnerability that they addressed in October.
They say they’re investigating the situation and the online payment system was taken down on December 13th.