Personal data of 3 million wrestling fans were left exposed on a database owned by World Wide Entertainment.

A trove of MacKeeper user data—some 13 million records—has been locked down after a researcher found an exposed and accessible database using a simple Shodan query. Chris Vickery revealed his discovery on Monday on Reddit in more of an appeal to reach officials at Kromtech, the parent company that owns MacKeeper, a suite of performance...