CVE-2021-21973

critical-risk
Published 2021-02-24

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).

Do I need to act?

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90.3% chance of exploitation in next 30 days
EPSS score — higher than 10% of all CVEs
!
CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Vmware

References (3)

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2021-0002.html
Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2021-0002.html
US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-...
72
/ 100
critical-risk
Severity 21/34 · High
Exploitability 27/34 · High
Exposure 24/34 · High