CVE-2021-22017

5.3 MEDIUM CISA KEV - Actively Exploited
Published: September 23, 2021 Modified: October 30, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0020.html
Source: security@vmware.com
Patch Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2021-0020.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
75.7%
99th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-01-24

Affected Vendors

vmware