Moscow: A hacker has claimed to have breached the US Federal Bureau of Investigation's website and leaked personal account information to a public site, media reported.

The hacker, known as CyberZeist, exploited a zero-day vulnerability in the highly-secured Plone Content Management System (CMS) of the FBI's website and leaked some of the information to Pastebin, an open source site that is often used by hackers to post stolen information and bits of code, RT.com reported on Thursday.