Overview
VMware vCenter Server and Cloud Foundation Server contain a SSRF vulnerability due to improper validation of URLs in a vCenter Server plugin. This allows for information disclosure.
https://nvd.nist.gov/vuln/detail/CVE-2021-21973
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-21973 |
| Vendor / Product | VMware — vCenter Server and Cloud Foundation |
| NVD Published | 2021-02-24 |
| NVD Last Modified | 2025-10-30 |
| CVSS 3.1 Score | 5.3 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| Severity | MEDIUM |
| CWE | CWE-918 |
| CISA KEV Added | 2022-03-07 |
| CISA KEV Deadline | 2022-03-21 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2022-03-21.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-03-07 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-03-21 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-21973 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |