CVE-2017-4940: VMware ESXi

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

The ESXi Host Client in VMware ESXi (6.5 before ESXi650-201712103-SG, 5.5 before ESXi600-201711103-SG and 5.5 before ESXi550-201709102-SG) contains a vulnerability that may allow for stored cross-site scripting (XSS). An attacker can exploit this vulnerability by injecting Javascript, which might get executed when other users access the Host Client.

Affected products

• VMware ESXi: version 5.5 only; version 6.0 only; version 6.5 only

Published 2017-12-20. Last modified 2026-06-17.