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Facebook security bug exposed 6 million users’ personal information

fbsecurityBy Sarah Silbert

Today, Facebook announced a security bug that compromised the personal account information of six million users. In a post on the Facebook Security page, the site’s White Hat team explained that some of the information the site uses to deliver friend recommendations was “inadvertently stored with people’s contact information as part of their account on Facebook.” When users downloaded an archive of their account via the DYI (download your information) tool, some were apparently given access to additional contact info for friends and even friends of friends. The post continues:

We’ve concluded that approximately 6 million Facebook users had email addresses or telephone numbers shared. There were other email addresses or telephone numbers included in the downloads, but they were not connected to any Facebook users or even names of individuals. For almost all of the email addresses or telephone numbers impacted, each individual email address or telephone number was only included in a download once or twice. This means, in almost all cases, an email address or telephone number was only exposed to one person. Additionally, no other types of personal or financial information were included and only people on Facebook – not developers or advertisers – have access to the DYI tool.

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