CVE-2021-21973: VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability
CVE-2021-21973 · Severity: critical · CVSS 5.3 · Exploited in the wild · Published 2022-03-07
The vSphere Client (HTML5) contains a Server Side Request Forgery (SSRF) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 can exploit this by sending a POST request, potentially leading to information disclosure.
Yes. CVE-2021-21973 is known to be exploited in the wild, first recorded on 7 March 2022. Treat it as urgent.
How severe is CVE-2021-21973?
Critical severity, with a CVSS score of 5.3, published 7 March 2022.
Which products and versions are affected?
VMware vCenter Server 7.x before 7.0 U1c, 6.7 before 6.7 U3l, 6.5 before 6.5 U3n; VMware Cloud Foundation 4.x before 4.2, 3.x before 3.10.1.2.
Is there a fix for CVE-2021-21973?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-21973 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-21973?
Check whether you run Broadcom vCenter Server or VMware Cloud Foundation. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
VMware vCenter Server 7.x before 7.0 U1c, 6.7 before 6.7 U3l, 6.5 before 6.5 U3n
VMware Cloud Foundation 4.x before 4.2, 3.x before 3.10.1.2
Timeline
2021-02-23: disclosed: Initial vendor advisory VMSA-2021-0002 published
2022-03-07: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2022-03-07: exploited: Confirmed exploited in the wild per CISA KEV entry