SQL injection vulnerability in the CheckEmail function in includes/functions.class.php in PBBoard 3.0.1 before 20141128 allows remote attackers to execute arbitrary SQL commands via the email parameter in the register page to index.php. NOTE: the email parameter in the forget page vector is already covered by CVE-2012-4034.2.
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.