Thu. May 6th, 2021

A database of phone numbers belonging to a reported 533 million Facebook users is being offered around by a Telegram bot. The secure messaging app is being misused to allow individuals to acquire sensitive information without the owner’s consent, and without even having to interact with the unnamed individual that is running the bot.

According to reports, the Facebook information being offered around by the Telegram bot stems from a 2019 vulnerability that has since been patched. If an individual knows a person’s Facebook ID, they can use the bot to acquire the corresponding telephone number. Conversely, if an individual knows someone’s phone number, the bot can be used to find out that person’s Facebook ID.

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