WhatsApp security flaw exposes data of 3.5B users

8 hours ago

A newly disclosed vulnerability in WhatsApp’s contact discovery system has exposed the phone numbers and profile metadata of up to 3.5 billion users, according to researchers from the University of Vienna. The flaw, which existed for years, allowed attackers to automate the process of checking which phone numbers were registered on WhatsApp, revealing not only the numbers themselves but also associated