Secunia Security Advisory – Some vulnerabilities and a weakness have been reported in MyBB, where some have an unknown impact, and others can be exploited by malicious people to conduct brute force or cross-site scripting attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/71368/sa32451.txt
Source: https://packetstormsecurity.com/files/71368/Secunia-Security-Advisory-32451.html