Sporting goods maker Easton-Bell Sports Inc. said Tuesday that data from around 6,000 online shoppers was stolen during the month of December, making it the latest company to fall victim to a cyberattack during the holiday season.

The Van Nuys, Calif.-based maker of Easton baseball bats, Riddell football helmets and Bell biking helmets said that the stolen information may have included customer names, addresses, credit card number and three- or four- digit security codes on the back of cards. The data was from customers who...