Secunia Security Advisory – Alexander Concha has reported a vulnerability in WordPress MU, which can be exploited by malicious users to bypass certain security restrictions and to compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/63344/sa28789.txt
Source: https://packetstormsecurity.com/files/63344/Secunia-Security-Advisory-28789.html