The server.php test script in ADOdb for PHP before 4.70, as used in multiple products including (1) Mantis, (2) PostNuke, (3) Moodle, (4) Cacti, (5) Xaraya, (6) PHPOpenChat, (7) MAXdev MD-Pro, and (8) MediaBeez, when the MySQL root password is empty, allows remote attackers to execute arbitrary SQL commands via the sql parameter.
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.