CVE-2017-4940

high-risk

Published 2017-12-20

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.

Do I need to act?

0.23% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.1/10 Medium

NETWORK / LOW complexity

Affected Products (20)

Esxi

Affected Vendors

Vmware

References (4)

Third Party Advisory http://www.securitytracker.com/id/1040024

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2017-0021.html

Third Party Advisory http://www.securitytracker.com/id/1040024

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2017-0021.html

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high-risk

Severity 23/34 · High

Exploitability 1/34 · Minimal

Exposure 31/34 · Critical