https://techcrunch.com/2018/09/11/british-airways-breach-caused-by-credit-card-skimming-malware-researchers-say/

A security firm says credit card skimming malware installed by hackers on British Airways’ website a few months ago was to blame for a data breach of over 380,000 credit cards.

Payments through the airline’s website and mobile app were stolen over the three week period, but a key clue was that travel information wasn’t affected.