Security News > 2021 > April > 533 million Facebook users’ phone numbers leaked on hacker forum
The mobile phone numbers and other personal information for approximately 533 million Facebook users worldwide has been leaked on a popular hacker forum for free.
The sold data included 533,313,128 Facebook users, with information such as a member's mobile number, Facebook ID, name, gender, location, relationship status, occupation, and email addresses.
From samples of the Facebook data seen by BleepingComputer, almost every user record contains a mobile phone number, a Facebook ID, a name, and the member's gender.
According to Alon Gal, CTO of cybercrime intelligence firm Hudson Rock, it is believed that threat actors exploited a now-patched vulnerability in Facebook's "Add Friend" feature that allowed them to gain access to member's phone numbers.
Today, this Facebook data leak has been released for free on the same hacker forum for eight site 'credits,' a form of currency on the hacker forum, equal to approximately $2.19.
Threat actors can also use mobile numbers and leaked info to perform SIM swap attacks to steal multi-factor authentication codes sent via SMS. It is advised that all Facebook users be wary of strange emails or texts requesting further information or telling you to click on enclosed links.