Wil Wheaton reposted a Tumblr post about this. But it's a PITA to deal with Tumblr, so let's go to Newsweek:

A foot fetishist discredited a Reddit post that falsely claimed to show a nude image of New York representative Alexandria Ocasio-Cortez, Vice reported.

An image of legs in a bathtub, with text reading "alexandria ocasio-cortez.instagram.post.9-3-2016," was posted to Reddit over the weekend. The image and text previously appeared on Twitter, 4chan, and online forums used for revenge porn, according to Vice. The photographer's breasts are also reflected in the faucet of the bathtub when the image is zoomed, according to Vice.

But foot fetishists from the site WikiFeet, which catalogues photos showing female celebrities' feet, said the feet pictured on Reddit were not Ocasio-Cortez's.

Good job, Wikifeetia Brown!

wikiFeet! (their preferred capitalization)

I must know more!

Nervously, I typed 'wikifeet.com' into my browser at work. Happily, nothing sketchy showed up on the front page. But, I did learn that Ivanka Trump won wikiFeet's Feet of the Year 2018!

Congratulations! Now go to jail.