That Facebook security flaw I told you about ended up affecting a lot more than just Facebook accounts (like that wasn’t bad enough).

According to Facebook, the accounts of 50 million users of the social media site were affected by a security breach caused by a flaw in their code.

Turns out that same flaw also exposed sites that allow you to use Facebook Login.

Thousands of other websites use the service including Instagram, the Tinder dating app, music service Spotify, auction site Ebay, the Uber ride-sharing app, Air BNB travel site, and even newspapers like the New York Times and Washington Post.

You’d only be affected if you used the Facebook login feature. It’s not known what, if anything, hackers did with the exposed data.

Facebook says the problem was taken care of by logging out of your account and back in but they haven’t completed a full investigation yet.

So you may want to consider resetting your password for any site you used Facebook Login for and also keeping an eye out for any suspicious activity.