The CTO of security firm Hudson Rock first discovered this data breach in January when a user on a hacking forum offered this information for a price.
At the time, Gal tweeted, “In early 2020, a vulnerability was exploited that made it possible to see the phone number associated with each Facebook account and created a database of the information that contains 533 million users in all countries.
“It got heavily underreported and today the database got a lot more worrying.
“A few days ago, a user created a Telegram bot that allows users to query the database for a small fee so that users can find the phone numbers associated with a very large chunk of Facebook accounts.
“Obviously, this has a huge impact on privacy.
“But over the weekend this huge amount of data was suddenly listed for free.”
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