How to check if your info was exposed in the Facebook data leak

Bleeping Computer

Data breach notification service Have I Been Pwned can now be used to check if your personal information was exposed in yesterday’s Facebook data leak that contains the phone numbers and information for over 500 million users.

Yesterday, a threat actor released the personal information for 533,313,128 Facebook users on a hacking forum, including mobile numbers, name, gender, location, relationship status, occupation, date of birth, and email addresses.

This data was originally sold in private sales after being collected in 2019 using a bug in the ‘Add Friend’ feature on Facebook. Facebook had closed this vulnerability soon after it was discovered, but threat actors continued to circulate the data until it was finally released practically for free ($2.19) yesterday. 

Since then, Troy Hunt has added the leaked data to his Have I Been Pwned data breach notification service to help users determine if a Facebook member’s data was exposed in the leak.

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