Facebook: Technical Flaw Exposed 6 Million Users

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Facebook has inadvertently exposed six million users’ phone numbers and e-mail addresses to unauthorized viewers over the last year, the company admitted late Friday.

Facebook blamed the data leaks, which began in 2012, on a technical flaw in its huge archive of contact information collected from its 1.1 billion users worldwide. As a result of the problem, Facebook users who downloaded contact data for their list of friends obtained additional information that they were not supposed to have.

The social media giant’s statement read in part:

“Because of the bug, some of the information used to make friend recommendations and reduce the number of invitations we send was inadvertently stored in association with people’s contact information as part of their account on Facebook. As a result, if a person went to download an archive of their Facebook account through our Download Your Information (DYI) tool, they may have been provided with additional email addresses or telephone numbers for their contacts or people with whom they have some connection. This contact information was provided by other people on Facebook and was not necessarily accurate, but was inadvertently included with the contacts of the person using the DYI tool.”

Facebook’s security team was alerted to the problem last week and fixed it within 24 hours. But Facebook did not publicly acknowledge the flaw until Friday afternoon, when it published a message on its blog explaining the situation.

A Facebook spokesman said the delay was because of a company procedure stipulating that regulators and affected users be notified before making a public announcement.

“We currently have no evidence that this bug has been exploited maliciously, and we have not received complaints from users or seen anomalous behavior on the tool or site to suggest wrongdoing,” Facebook said on its blog.

While the privacy breach was limited, “It’s still something we’re upset and embarrassed by, and we’ll work doubly hard to make sure nothing like this happens again,” it added.

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