SQL injection vulnerability in Guruperl.net Advertise With Pleasure! Professional (aka AWP PRO) 6.6 and earlier allows remote attackers to execute arbitrary SQL commands via the group_id parameter in a list_zone action to cgi/client.cgi.
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.