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.

Published: 2017-11-17 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-4928 is rated Moderate Risk (53.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.24%). EPSS rose +1.06% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-4928

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.18% 1.24% +1.06%
2 2025-03-30 0.13% 0.18% +0.05%
3 2025-03-29 — 0.13% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-4928

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-4928

Affected software / configurations for CVE-2017-4928

Vendor Product Version Raw CPE
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:*:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:1:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:1a:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:1b:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:1c:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:2:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:2b:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:2d:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:2e:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:3:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:3a:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:3b:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:3d:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:3e:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:b:*:*:*:*:*:*
vmware vcenter_server 5.5 cpe:2.3:a:vmware:vcenter_server:5.5:c:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:*:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:1:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:1b:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:2:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:2a:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:2m:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:3:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:3a:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:3b:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:a:*:*:*:*:*:*
vmware vcenter_server 6.0 cpe:2.3:a:vmware:vcenter_server:6.0:b:*:*:*:*:*:*

References for CVE-2017-4928

URL Tags
http://www.securityfocus.com/bid/101785 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039759 Third Party Advisory VDB Entry
https://www.vmware.com/security/advisories/VMSA-2017-0017.html Patch Vendor Advisory
cvelogic Threat Intelligence