A recent breach at Ticketmaster was just "the tip of the iceberg" of a wider, massive credit card skimming operation, new research has found.
At least 800 e-commerce sites are said to be affected, after they included code developed by third-party companies and later altered by hackers, according to security firm RiskIQ. The credit card skimming effort of a massive campaign by a threat group -- dubbed Magecart, operational since at least 2015 -- targets software companies that build and provide code that developers include on their websites to improve the site or customer experience. After the hackers break in and alter the code, it affects every website that it runs on, potentially affecting millions of users every day.

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