News 5 million U.S. credit cards were just leaked online — how to stay safe and what to do next

Leak specifics? Which cards? Something useful?
So if you look at the original report from LEAKD (linked in the article), they don't provide any real specifics and it was their security researchers that first discovered this data leak. From the screenshots they analyzed, a lot of the data and credit card details were from people who really thought they just won an iPhone when clicking on a shady site or others who thought they were getting an almost impossible deal on a more expensive item. The cybercriminals who put this unsecured database together also used phishing to get a lot of these credit card numbers and other details. I'm going to keep looking to see if anymore detailed info has come to light and I'll email LEAKD to see if they can share what they found with me.

If you aren't the type of person to fall for obvious scams or haven't sent over your financial details via email to someone that contacted you out of the blue, you're info most likely wasn't exposed in this data leak. Wish I had more details myself but I'm just going off their report at the moment.