Facebook users can now enter their phone numbers into a website to see if they appeared in a recent Facebook data breach which occurred last weekend.

Details of more than 533 million Facebook users were leaked in a database online, largely consisting of mobile numbers and email.

Facebook users can use the Have I Been Pwned online tool to check if their numbers or emails were compromised by the hackers.

User Interface for haveibeenpwned.com website

Facebook says the data is from an “old” breach in 2019 but privacy watchdogs are now investigating the hacked.

Facebook Inc on Tuesday said that the data leak affecting potentially 533 million Facebook users stemmed from a misuse of a feature in 2019 and that the company had fixed the hole after identifying the problem at the time.

Techtalkarena.com reported last week that phone numbers and other details from Facebook user profiles were available in a public domain database for free. Facebook said “malicious hackers” had obtained the data before September 2019 by “scraping” profiles using a vulnerability in the social media service’s tool to sync contacts.

The company said it identified the issue at the time and modified the tool.

“As a result of the action we took, we are confident that the specific issue that allowed them to scrape this data in 2019 no longer exists,” Facebook said on their page.


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