SQL injection vulnerability in the loadByKey function in the TznDbConnection class in tzn_mysql.php in Tirzen (aka TZN) Framework 1.5, as used in TaskFreak! before 0.6.3, allows remote attackers to execute arbitrary SQL commands via the username field in a login action.
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.