CVE-2021-21973

Known Exploited

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).

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 87.03% Top 5%
KEV Since 
Vendor Advisory vmware.com
Affected: n/a VMware vCenter Server
Affected: n/a VMware Cloud Foundation
Published at:
Updated at:

References

Link Tags
https://www.vmware.com/security/advisories/VMSA-2021-0002.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-21973?
CVE-2021-21973 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21973?
To fix CVE-2021-21973, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21973 being actively exploited in the wild?
It is confirmed that CVE-2021-21973 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~87% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21973?
CVE-2021-21973 affects n/a VMware vCenter Server, n/a VMware Cloud Foundation.
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