An attacker can take over any WordPress site that has comments enabled by tricking an administrator of a target blog to visit a website set up by the attacker. As soon as the victim administrator visits the malicious website, a cross-site request forgery (CSRF) exploit is run against the target WordPress blog in the background, without the victim noticing. The CSRF exploit abuses multiple logic flaws and sanitization errors that when combined lead to Remote Code Execution and a full site takeover.

source: white