No, this is very serious. Scammers now have a list of people who have/had life insurance with Caixa.

It doesn’t matter if no other information is leaked, the mere fact that you appeared in this list is financial data about you.

Also, Caixa admits the leak affected all of their insurance customers. So even if you are not on the list, scammers now know one more thing about you. This is bad.

What's the scam this enables for scammers?