MyBB suffers from HTML code injection in the signature field via an image tag.
c410da084c108cd59068f82241a35d6600c0f7a3a16281bfbfccadcdd1c372d9
##Night_Warrior<Kurdish Hacker>
##night_warrior771[at]hotmail.com
##MyBB Signature HTML Code Injection
##http://www.mybboard.com/
example:
<img src=javascript:alert('XSS')>
Contact :night_warrior771[at]hotmail.com
Night_Warrior<Kurdihs Hacker>