Magecart skimmers remained active on Claire's website for 50 days before being discovered earlier this year. Today’s columnist, Pedro Fortuna of Jscrambler, offers security pros a checklist for a selecting a product to combat Magecart attacks. (Photo by Keith Mayhew/SOPA Images/LightRocket via Getty Images)

Magecart groups have made many successful attacks on high-profile companies over the past two years. In a Magecart attack, attackers covertly inject credit card skimming code into the checkout pages of e-commerce websites to exfiltrate data on thousands of customers.

While some might only remember Magecart from the 2018 British Airways breach, one of these cybercrime groups breached the payment forms of retail giant Claire’s earlier this summer. And just a month or so ago, attackers breached the websites of eight U.S. cities through a third-party service.

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