2011 — WordPress: Hackers accessed several of WordPress's servers, 18.0M records
Data compromised
Personal information
Technical writeup
Hackers accessed several of WordPress's servers. All information on the servers could have been accessed. Source code, API keys and social media passwords may have been exposed. Blog comments from WordPress spokespeople reveal the stage of the investigation and that phone numbers and financial information were unlikely to have been exposed.
Root cause
Hacking