CVE-2021-22017
MEDIUM KEV NUCLEIVMware vCenter Server - Server-Side Request Forgery via URI Normalization Bypass
Title source: llmExploitation Summary
CVE-2021-22017 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added January 10, 2022. A Nuclei detection template is also available.
Description
Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.
Nuclei Templates (1)
vCenter Server - Improper Access Control
MEDIUMVERIFIEDby daffainfo
Shodan:
VMware vCenter Server
References (2)
Core 2
Core References
Patch, Vendor Advisory x_refsource_misc
https://www.vmware.com/security/advisories/VMSA-2021-0020.html
US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017
Scores
CVSS v3
5.3
EPSS
0.7483
EPSS Percentile
98.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
yes
Technical Impact
partial
Details
CISA KEV
2022-01-10
VulnCheck KEV
2022-01-10
InTheWild.io
2021-09-26
ENISA EUVD
EUVD-2021-9186
Status
published
Products (1)
vmware/vcenter_server
6.7
Published
Sep 23, 2021
KEV Added
Jan 10, 2022
Tracked Since
Feb 18, 2026