LinkedIn

SIZE : 700 million users DATE : June 2021

Facebook

SIZE : 533 million users DATE : April 2019 ( and April 2021 )

Two third-party app datasets were the weak link here that saw more than 500 million Facebook users having their likes , reactions and Facebook data exposed . That anxiety intensified when that same information was made available on the Dark Web for free in April 2021 . This particularly exposed phone numbers associated with Facebook accounts .

Let ’ s be careful with the terminology here . LinkedIn claims this megahack of 92 % of its users was not in fact a data breach but a violation of their terms and services through prohibited data scraping . This data included email addresses , names , phone numbers , usernames , geolocations . The hacker scraped the data by exploiting LinkedIn ’ s API . While much of the information is indeed in the public domain , those email addresses are not usually made public .

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