Nette Database through 3.2.4 allows SQL injection in certain situations involving an untrusted filter that is directly passed to the where method. NOTE: the vendor's position is that this is intended behavior.
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.