VMware Security Advisory 2016-0023 – VMware ESXi updates address a cross-site scripting issue. 2. Relevant Releases VMware vSphere Hypervisor (ESXi) 3. Problem Description a. Host Client stored cross-site scripting issue The ESXi Host Client contains a vulnerability that may allow for stored cross-site scripting (XSS). The issue can be introduced by an attacker that has permission to manage virtual machines through ESXi Host Client or by tricking the vSphere administrator to import a specially crafted VM. The issue may be triggered on the system from where ESXi Host Client is used to manage the specially crafted VM.