What is CVE-2017-4926?

CVE-2017-4926 is a medium-severity vulnerability in VMware Vcenter Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-09-15.

How severe is CVE-2017-4926?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in VMware Vcenter Server

CVE-2017-4926

VMware vCenter Server (6.5 prior to 6.5 U1) contains a vulnerability that may allow for stored cross-site scripting (XSS). An attacker with VC user privileges can inject malicious java-scripts which will get executed when other VC users access the page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.4th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

VMware Vcenter Server — versions 6.5 prior to 6.5 U1
VMware Vcenter Server — versions 6.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securitytracker.com/id/1039364 (VDB Entry, Third Party Advisory, vdb-entry)
www.vmware.com/security/advisories/VMSA-2017-0015.html (Patch, Vendor Advisory)
www.securityfocus.com/bid/100844 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-4926?: CVE-2017-4926 is a medium-severity vulnerability in VMware Vcenter Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-09-15.
How severe is CVE-2017-4926?: Medium severity. CVSS v3 base score is 5.4 out of 10.