Facebook stored “hundreds of millions” of account passwords without encryption and viewable as plain text to tens of thousands of company employees, the social media giant confirmed Thursday.
The incident could have affected as many as 600 million users, a significant portion of Facebook’s user base of 2.7 billion people.
Here's what Facebook posted:
"As part of a routine security review in January, we found that some user passwords were being stored in a readable format within our internal data storage systems. This caught our attention because our login systems are designed to mask passwords using techniques that make them unreadable. We have fixed these issues and as a precaution we will be notifying everyone whose passwords we have found were stored in this way.
To be clear, these passwords were never visible to anyone outside of Facebook and we have found no evidence to date that anyone internally abused or improperly accessed them. We estimate that we will notify hundreds of millions of Facebook Lite users, tens of millions of other Facebook users, and tens of thousands of Instagram users. Facebook Lite is a version of Facebook predominantly used by people in regions with lower connectivity.
In the course of our review, we have been looking at the ways we store certain other categories of information — like access tokens — and have fixed problems as we’ve discovered them. There is nothing more important to us than protecting people’s information, and we will continue making improvements as part of our ongoing security efforts at Facebook."
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