Data breach
QuinStreetquinstreet.com
4 907 802 accounts exposed in a breach dated 2015-12-14.
Breached2015-12-14Added to HIBP2016-12-17 UTCUpdated by HIBP2016-12-17 UTCAccounts4 907 802Domainquinstreet.com
Verified
What happened in Have I Been Pwned’s words
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.
Exposed data as HIBP classifies it
- Dates of birth
- Email addresses
- IP addresses
- Passwords
- Usernames
- Website activity
How HIBP qualifies it
- HIBP verified that the data came from this service.
Source: Have I Been Pwned (CC BY 4.0)
Copied from HIBP 2026-11-05 03:50 UTC