Multiple SQL injection vulnerabilities in Vanilla Forums before 2.0.18.8 allow remote attackers to execute arbitrary SQL commands via the parameter name in the Form/Email array to (1) entry/signin or (2) entry/passwordrequest.
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.