SQL injection vulnerability in misc.php in MyBulletinBoard (MyBB) 1.03, when register_globals is enabled, allows remote attackers to execute arbitrary SQL commands by setting the comma variable value via the comma parameter in a cookie. NOTE: 1.04 has also been reported to be affected.
Improper Neutralization of Special Elements used in an SQL Command The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.