Vertiv Avocent UMG-4000 version 4.2.1.19 web interface is vulnerable to stored cross site scripting

The web interface of the Vertiv Avocent UMG-4000 version 4.2.1.19 is vulnerable to stored XSS. A remote attacker authenticated with an administrator account could store a maliciously named file within the web application that would execute each time a user browsed to the page.