QuinStreet Data Breach

What happened

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

Recommended actions

• Change your QuinStreet password immediately, and update it anywhere you reused the same password.
• Enable two-factor authentication on the affected account and on your critical services (email, banking).
• Watch for targeted phishing emails referencing QuinStreet — attackers weaponise breach data quickly.
• Exposed identity data raises identity-theft risk — consider credit monitoring or a credit freeze.
• Check whether your email address appears in this breach on haveibeenpwned.com.