CoinOtag
2025-11-19 16:25:17

WhatsApp Flaw May Expose 3.5 Billion Users’ Phone Numbers, Researchers Warn

WhatsApp’s contact discovery feature has a critical vulnerability exposing phone numbers of 3.5 billion users since 2017, allowing automated scraping without rate limits. Researchers from the University of Vienna demonstrated this by extracting millions of numbers quickly, highlighting major privacy risks in the widely used messaging app. Austrian researchers exploited the flaw to collect 3.5

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