The NEX-Forms WordPress plugin before 7.9.7 does not properly sanitise and escape user input before using it in SQL statements, leading to SQL injections. The attack can be executed by anyone who is permitted to view the forms statistics chart, by default administrators, however can be configured otherwise via the plugin settings.
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.