In Nintex Automation 5.6 and 5.7 before 5.8, the K2 SmartForms Designer folder has configuration files (web.config) containing passwords that are readable by unauthorized users.
SQL injection vulnerability in Runtime/Runtime/AjaxCall.ashx in K2 blackpearl, smartforms, and K2 for SharePoint 4.6.7 allows remote attackers to execute arbitrary SQL commands via the xml parameter.