
Dashboard 1.4.2 contains a fix for an XSS security bug, so I think it would be prudent to update the Dashboard version 'shipped' with kubernetes to this version
Kubernetes Dashboard
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Kubernetes Dashboard is a general purpose, web-based UI for Kubernetes clusters. It allows users to manage applications running in the cluster, troubleshoot them, as well as manage the cluster itself.
Learn more at: https://github.com/kubernetes/dashboard