CVE Database · CVE-2021-21973
CVSS v3.1
5.3
EPSS
88.01%
Published
Feb 24, 2021
Modified
Oct 30, 2025
CISA Known Exploited Vulnerability
Added: 2022-03-07 · Due: 2022-03-21
Apply updates per vendor instructions.
Public PoC / Exploit (3)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
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).
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NWeaknesses (CWE)
Affected Products (43)
References (3)