How severe is CVE-2017-4928?

CVE-2017-4928 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-4928 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-4928?

CVE-2017-4928 primarily affects Vmware Vcenter Server. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-4928?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-4928 published?

CVE-2017-4928 was published on 2017-11-17 and last updated on 2026-06-17.

CVE-2017-4928

CVE-2017-4928 is a high-severity vulnerability in Vmware Vcenter Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Vmware Vcenter Server
Published: 2017-11-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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. 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.
How severe is CVE-2017-4928?: CVE-2017-4928 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-4928 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-4928?: CVE-2017-4928 primarily affects Vmware Vcenter Server. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-4928?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-4928 published?: CVE-2017-4928 was published on 2017-11-17 and last updated on 2026-06-17.

References

Affected products (27)

cpe:2.3:a:vmware:vcenter_server:5.5:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:1:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:1a:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:1b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:1c:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:2:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:2b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:2d:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:2e:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:3:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:3a:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:3b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:3d:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:3e:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:5.5:c:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:*:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:1:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:1b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:2:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:2a:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:2m:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:3:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:3a:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:3b:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:a:*:*:*:*:*:*
cpe:2.3:a:vmware:vcenter_server:6.0:b:*:*:*:*:*:*

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