A well known Bug-bounty hunter Athul Jayaram, who discovered the issue, calls the phone numbers “leaked” and characterizes the situation as a security bug that puts WhatsApp users’ privacy at risk.
The WhatsApp feature called “Click to Chat” puts users’ mobile phone numbers at risk — by allowing Google Search to index them for anyone to find. But WhatsApp owner Facebook says it is no big deal and that the search results only reveal what the users have chosen to make public anyway.
View Athul Jayaram Website or read more indepth information at https://threatpost.com/whatsapp-phone-numbers-google-search-results/156141/
