In approximately late 2015, the maker of "performance marketing products" QuinStreet had a number of their online assets compromised. The attack impacted 28 separate sites, predominantly technology forums such as flashkit.com, codeguru.com and webdeveloper.com (view a full list of sites). QuinStreet advised that impacted users have been notified and passwords reset. The data contained details on over 4.9 million people and included email addresses, dates of birth and salted MD5 hashes.
Accounts breached: 4907802
Breached on: December 14, 2015
Exposed data: Dates of birth, Email addresses, IP addresses, Passwords, Usernames, and Website activity
Domain: quinstreet.com
Added on: December 17, 2016