CVE-2017-4928: VMware vSphere Web Client vulnerability

CVE-2017-4928: The flash-based vSphere Web Client (6.0 prior to 6.0 U3c and 5.5 prior to 5.5 U3f) i.e.

The flash-based vSphere Web Client (6.0 prior to 6.0 U3c and 5.5 prior to 5.5 U3f) i.e. not the new HTML5-based vSphere Client, contains SSRF and CRLF injection issues due to improper neutralization of URLs. An attacker may exploit these issues by sending a POST request with modified headers towards internal services leading to information disclosure.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 03:48 UTC (UTC+00:00)

Security readout for executives and security teams

Older Flash-based VMware vSphere Web Client versions could be abused to make the management interface interact with internal services and leak information. This affects vSphere Web Client 6.0 before U3c and 5.5 before U3f, not the newer HTML5 client named in the CVE text. Likely exposure is limited to organizations still running VMware vSphere Web Client 6.0 before 6.0 U3c or 5.5 before 5.5 U3f. Risk increases where the web client is reachable from broad internal networks or untrusted users. Treat this as a management-plane hygiene issue with moderate urgency. Prioritize remediation where legacy vSphere management interfaces remain reachable, especially in flat internal networks or environments with many administrative users. Mitigation focus: Upgrade vSphere Web Client 6.0 to 6.0 U3c or later.; Upgrade vSphere Web Client 5.5 to 5.5 U3f or later.; Prefer the HTML5-based vSphere Client where supported..

Prepared: Jun 12, 2026, 20:07 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Cloud metadata behavior lookup

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CVE-2017-4928 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 17, 2017, 14:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.vmware.com/security/advisories/VMSA-2017-0017.htmlCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

VMwarevSphere Web Client6.0 prior to 6.0 U3c, 5.5 prior to 5.5 U3fListed

Weakness

CWE details

No CWE listed

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