Yahoo Data Breach

What happened

In July 2012, Yahoo! had their online publishing service "Voices" compromised via a SQL injection attack. The breach resulted in the disclosure of nearly half a million usernames and passwords stored in plain text. The breach showed that of the compromised accounts, a staggering 59% of people who also had accounts in the Sony breach reused their passwords across both services.

Exposed data

Recommended actions

• Change your Yahoo 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 Yahoo — attackers weaponise breach data quickly.
• Check whether your email address appears in this breach on haveibeenpwned.com.