A WhatsApp vulnerability that allegedly left the phone numbers of around 300,000 people exposed has now been fixed.
The loophole was within the Click to Chat feature which streamlines conversations. It was first revealed by the WhatsApp-focused website WaBetaInfo and later reported by security researcher Athul Jayaram.
The feature lets users create a wa.me/ URL that can be shared with friends and prospective customers to initiate a chat or join a group, without requiring them to save a phone number first.
WhatsApp should have asked Google and other search engines to not index these links.
