2015 — AshleyMadison.com: 20th July 2015: DEVELOPING: Online hookup site for…
Technical writeup
20th July 2015: DEVELOPING: Online hookup site for extra-marital affairs has been severely breached and the personal details of 37m users, as well as company financial records, threatened with release. Notorious hacking outfit The Impact Team has claimed responsibility. The hackers are demanding the shutdown of AM.com and other associated sites.
Root cause
Hacked