A SQL injection vulnerability in Nagios XI from version 5.11.0 up to and including 5.11.1 allows authenticated attackers to execute arbitrary SQL commands via the ID parameter in the POST request to /nagiosxi/admin/banner_message-ajaxhelper.php
In Nagios XI through 5.8.5, in the schedule report function, an authenticated attacker is able to inject HTML tags that lead to the reformatting/editing of emails from an official email address.