This was the second breach for the site in less than two years.
In May 2015, Adult Friend Finder was hacked, and the attackers exposed details of nearly four millions users.
We found out this week that "sex and swinger" social network Adult Friend Finder was breached, along with all of its other sites. (FFN) operates Adult Friend Finder.com, webcam sex-work site cams.com, and a few others; a total of six databases were reported in the haul.
The hack and dump performed on FFN has exposed 412,214,295 accounts, according to breach notification site Leaked Source, which disclosed the extent of the privacy disaster on Sunday.
Making it worse than a typical security fail is what's in the data.
Although FFN advised users who might be reading its press release to change their passwords, it still hasn't notified its customers directly, and there are no notifications on any of its compromised websites.
The compromised information included sexual preferences and personal details, whether they are gay or straight, and whether they are seeking extramarital affairs, along with email addresses, usernames, dates of birth, postcodes and the unique internet addresses of users' computers.
In that instance, Tek Security had discovered the files on a darknet forum, and noted that AFF hadn't reported the breach.
Everyone involved believed this was just the beginning of a massive data breach.
After their October disclosure got Friend Finder's attention, Revolver tweeted that FFN's security issue was resolved and "no customer information ever left their site" -- which was clearly untrue. Friend Finder Network conceded in a press release that it was "addressing a security incident involving certain customer usernames, passwords and email addresses" on Monday.