CVEvulnerability

CVE-2021-21973

5.3 MEDIUM Known exploited Published 2021-02-24 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability — VMware vCenter Server and Cloud Foundation

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.

Added to KEV
2022-03-07
Remediation due
2022-03-21
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-21973
Status
Analyzed
Published
2021-02-24
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-918

Description

The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Affected configurations

• vmware cloud foundation (>= 3.0 < 3.10.1.2) • vmware cloud foundation (>= 4.0 < 4.2) • vmware vcenter server 6.5 • vmware vcenter server 6.7 • vmware vcenter server 7.0

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

Referenced by CWE · observed example (1)

  • CWE-918 Server-Side Request Forgery weakness

References