AshleyMadison, a website that helps individuals hook up for affairs, has been hacked. The site claims to serve over 37.5 million users, and the hackers responsible say that the stolen data includes customer information including real names and addresses, credit card details, and sexual fantasies.

Security journalist Brian Krebs reported late yesterday that he had seen a published sample of the data contained user account information for some of the site's customers, as well as "maps of internal company servers, employee network account information, company bank account data and salary information."

A spokesperson for Avid Life Media (ALM), the company that owns AshleyMadison, confirmed the site had been hacked. "We apologize for this unprovoked and criminal intrusion into our customer's' information," they told Motherboard in an email.

The spokesperson claimed that "our team has now successfully removed the posts related to this incident as well as all Personally Identifiable Information (PII) about our users published online." They said this was done through the use of the Digital Millennium Copyright Act (DMCA), and that ALM has "engaged one of the world's top IT security teams—with whom we have worked in the past—to take every possible step toward mitigating the attack."

Krebs said that in a manifesto, the hacker or hackers responsible—who go by the name "The Impact Team"—said they will release all customer records, as well as the company's employee documents and emails, if their demands are not met. The hackers want ALM to shut down both AshleyMadison and EstablishedMen, another of its sites. EstablishedMen has over 1 million members, and aims to connect "young, beautiful women with rich, successful men!" according to its website.