CVE-2021-21993

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-23 · updated 2026-06-17
Weakness: CWE-918

Description

The vCenter Server contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in vCenter Server Content Library. An authorised user with access to content library may exploit this issue by sending a POST request to vCenter Server leading to information disclosure.

Affected products

VMware Cloud Foundation: from 3.0 before 5.0 — fixed in 5.0
VMware vCenter Server: 6.5, 6.7, 7.0
VMware vCenter Server, VMware Cloud Foundation: VMware vCenter Server(7.x before 7.0 U2c, 6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation (4.x before 4.3 and 3.x before 3.10.2.2)

How to fix

Upgrade to a fixed version: VMware Cloud Foundation 5.0. Check the vendor advisory for mitigations.

References

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