Reality TV super stars The Kardashians and The Jenners have always provided a lot of products for their massive online followings. Fans should be wary of the latest offerings though, which have been exposed as a cyber security threat.

It has been reported that the new websites from Kim, Khloe, Kendall and Kylie, exposed the names and email address of 900,000 users. They did seemingly keep bank details safe though.

Developer Alaxic Smith made the discovery whilst digging around the code from the new sites, which push exclusive content to paying subscribers.

Smith found that through opening a mini Javascript file, logging into the site, and making a call to the API, he could see all the details of the sites users.

The hack also revealed that Khloe, not Kim, is the most popular of the sisters, having 96,635 uses.