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PHILADELPHIA (CBS) — Another week, another problem for Facebook. The social media giant is admitting that it failed to properly protect the passwords of hundreds of millions of users.

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Facebook says the passwords were stored in an internal database that its workers were able to access.

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The company has not said how long the passwords were stored that way, but noted the issued was discovered in January during a security review.

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Facebook says it will notify Facebook and Instagram users if their passwords were affected.