Check_MK Werk 6516: Fixed stored XSS using alert handler config

ID: 6516 Title: Fixed stored XSS using alert handler config Component: alerts Level: 1 Class: Security fix Version: 1.6.0i1 A user with permission to the alert handler administration could use an alert rule to store arbitrary javascript code which would then be executed in the context of the browser of another user with permission to the alert handler administration when viewing the list of alert handlers.