What is CVE-2021-21985?

CVE-2021-21985 is a critical-severity vulnerability in Vmware Cloud_foundation, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-05-26.

How severe is CVE-2021-21985?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-21985 known to be exploited?

Yes. CVE-2021-21985 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 91 public proof-of-concept repositories are indexed.

SSRF in Vmware Cloud_foundation

CVE-2021-21985

The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Vmware Cloud_foundation
Vmware Vcenter_server — versions 6.5, 6.7, 7.0
N/a Vmware Vcenter Server And Cloud Foundation — versions VMware vCenter Server (7.x before 7.0 U2b, 6.7 before 6.7 U3n, 6.5 before 6.5 U3p) and VMware Cloud Foundation (4.x before 4.2.1, 3.x before 3.10.2.1)

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2021-11-17.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

security@vmware.com (x_refsource_MISC, Vendor Advisory)
security@vmware.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
security@vmware.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-21985?: CVE-2021-21985 is a critical-severity vulnerability in Vmware Cloud_foundation, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-05-26.
How severe is CVE-2021-21985?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-21985 known to be exploited?: Yes. CVE-2021-21985 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 91 public proof-of-concept repositories are indexed.