source: https://www.securityfocus.com/bid/15400/info

ActiveCampaign 1-2-All Broadcast Email is prone to an SQL-injection vulnerability. This is an input-validation issue related to data that will be used in SQL queries, allowing a remote user to influence the structure and logic of a query.

Successful attacks could compromise the software. Depending on the database implementation and the nature of the affected query, the attacker may be able to gain unauthorized access to the database. 

http://www.example.com/[12allTarget]/admin/index.php

Username: ' or 1=1 /*
Password: (Nothing)(Blank)