Secunia Security Advisory – Some vulnerabilities have been reported in MyBB, where some have unknown impacts and others can be exploited by malicious people to conduct script insertion and SQL injection attacks.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/42746/sa18281.txt
Source: https://packetstormsecurity.com/files/42746/Secunia-Security-Advisory-18281.html

