Data of 500 million Facebook users leaked Social media giant claims vulnerability used by hackers two years ago Follow Us Question of the Day In this Aug. 11, 2019, file photo an iPhone displays a Facebook page in New Orleans. Facebook says hackers in China used fake accounts and impostor websites in a bid to break into the phones of Uyghur Muslims, Facebook announced ... more > By Ryan Lovelace - The Washington Times - Monday, April 5, 2021 The personal data of more than 500 million Facebook users became widely available online this weekend, although the social media giant said it fixed the vulnerability used by hackers two years ago.