WhatsApp recently patched a flaw that left 200 million users vulnerable to being hacked using booby-trapped digital cards for contact details, according to a US computer security firm.<br />Facebook-owned messaging application WhatsApp boasts more than 900 million users, some 200 million of them who access the service on computer browser software that mirrors activity from mobile devices.<br />Opening tainted cards allowed viruses to infect computers, potentially allowing hackers to steal control or information, according to an online post by Check Point computer security firm.
