Facebook said on Friday that hackers were able to access the personal information of 14 million people through a security flaw that the company first disclosed last month, and that the data exposed included information such as recent check-ins and searches.
Facebook said in a blog post that people would be able to check whether they were affected by the attack by visiting a Facebook help center online.
The social networking company disclosed two weeks ago that a security flaw in Facebook’s “view as” feature had allowed hackers to potentially take over people’s profiles.
The company’s initial estimate was that the attack affected almost 50 million accounts, a number it revised down on Friday.
Facebook said that for the 14 million people, the attackers accessed information including “username, gender, locale/language, relationship status, religion, hometown, self-reported current city, birthdate, device types used to access Facebook, education, work, the last 10 places they checked into or were tagged in, website, people or Pages they follow, and the 15 most recent searches.”