The information exposed can be particularly devastating to people living in small towns, where they are more easily identified.
For example, one person exposed in the hack is a 40-year old welder from a small Illinois town of a few thousand people.
Included in the exposed personal information are customers' email addresses, usernames, passwords, birthdays and zip codes, in addition to their sexual preferences.
No credit card data has yet been uncovered as part of the hack.
Troy Hunt, an Australian data breach expert who runs the Have I Been Pwned data breach notification site, says that at first glance some of the data appears legitimate, but it's still early to make a call. "I'd need to see a complete data set to make an emphatic call on it." If the data is accurate, it would mark one of the largest data breaches of the year behind Yahoo, which in October blamed state-sponsored hackers for compromising at least 500 million accounts in late 2014 (see Massive Yahoo Data Breach Shatters Records).
The hack also revealed that the company had kept information on 15 million accounts that users had deleted, as well as information on users for assets it no longer owned, such as Penthouse.In May 2015 it was revealed that 3.9 million Adult Friend Finder accounts had been stolen by a hacker nicknamed ROR[RG] (see Dating Website Breach Spills Secrets).The alleged leak is likely to cause panic among users who created accounts on Friend Finder Network properties, which primarily are adult-themed dating/fling websites, and those run by subsidiary Steamray Inc., which specializes in nude model webcam streaming.Adult Friend Finder asks customers to detail their interests and, based on those criteria, matches people for sexual encounters.The site, which boasts 64 million members, claims to have "helped millions of people find traditional partners, swinger groups, threesomes, and a variety of other alternative partners." The information Adult Friend Finder collects is extremely personal in nature.The company said it doesn't yet know the full scope of the breach, but it promised to "work vigilantly," noting that Friend Finder Networks "fully appreciates the seriousness of the issue." "We cannot speculate further about this issue, but rest assured, we pledge to take the appropriate steps needed to protect our customers if they are affected," the company said.Adult dating service company Friend Finder Network has reportedly been hacked, with over 412 million accounts, email addresses, and passwords from their websites made available on criminal marketplaces.He "will become anybody's slave" and lied about his age on the site, claiming to be 29.The breach was carried out by a hacker who goes by the moniker ROR[RG].By comparison, the Ashley Madison hack that took place in July 2015 revealed 32 million accounts, although that attack was also accompanied by a more aggressive extortion campaign.According toa security researcher going by the name Revolver uncovered Local File Inclusion vulnerabilities on the site in October.