Breach date: 2015-05-21. Added to this index: 2015-05-22. Accounts affected: about 3.9M. Domain: adultfriendfinder.com.
What happened
In May 2015, the adult hookup site Adult FriendFinder was hacked and nearly 4 million records dumped publicly. The data dump included extremely sensitive personal information about individuals and their relationship statuses and sexual preferences combined with personally identifiable information.
Breach data sourced from Have I Been Pwned, used under CC BY 4.0. Additional breach metadata provided by XposedOrNot. DataExposed is an independent service and is not affiliated with or endorsed by either.
What was exposed
Dates of birth: Your full birth date, day, month and year, collected at signup for age checks, identity verification, insurance quotes, birthday offers or government services.
Email addresses: The email address you used to register or log in. It is the most common field in breaches because it doubles as your username on most sites.
Genders: The gender or sex recorded on your profile, usually picked from a list at signup, sometimes with a title such as Mr or Ms or a gender identity option beyond male and female.
Geographic locations: A general location recorded on your account, such as a country, state, city, postcode or region, either typed in by you or estimated from your IP address.
IP addresses: The network addresses your devices used when you signed up, logged in or posted, recorded by almost every website in its access logs.
Races: Your racial or ethnic background as recorded by a service, collected for demographics, health research, employment forms, dating preferences or census style surveys.
Relationship statuses: A label describing your relationship situation, such as single, married, separated, divorced or widowed, stored by dating apps, social networks, insurers and marketing forms.
Sexual orientations: Information about who you are attracted to, such as gay, lesbian, bisexual or heterosexual, recorded by dating apps, surveys, health services, social platforms or community organisations.
Spoken languages: The languages listed on your profile or account settings, collected by dating apps, job sites, travel services and customer support systems.
Usernames: The handle or login name you chose for an account, which may be public on forums, games and social platforms or used privately to sign in.
What to do now
Check whether your own address is in this dataset with the free email breach check.
Review the accounts connected to this service and turn on two-factor authentication.
Turn on two-factor authentication on your email account first, because it is the reset path for everything else.
Treat calls and messages that quote real details about you as hostile until you verify them another way.
Frequently asked questions
What data was leaked in the Adult FriendFinder (2015) breach?
The Adult FriendFinder (2015) breach exposed Dates of birth, Email addresses, Genders, Geographic locations, IP addresses, Races, Relationship statuses, Sexual orientations, Spoken languages, Usernames. About 3.9M accounts were affected.
Was I affected by the Adult FriendFinder (2015) breach?
Run the free email breach check with the address you used on that service. It will tell you whether your address appears in this dataset.
What should I do about the Adult FriendFinder (2015) breach?
Treat any message that quotes details from this breach as suspicious, turn on two-factor authentication, and consider removing your details from people-search sites if your address or phone was included.