CVE-2021-22017

At a glance

Severity: MEDIUM 5.3
Exploitation: Known exploited (CISA KEV) · added 2022-01-10
Exploited per ENISA since 2022-01-10
EPSS: EPSS 49.18 % · percentile 99 (2026-10-27)
State: PUBLISHED
Published: 2021-09-23
Updated: 2025-10-21
Assigner: vmware
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	CISA-ADP
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	NVD · nvd@nist.gov (Primary)
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 2.0	MEDIUM 5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-9186
GCVE · GCVE-0-2021-22017

CERT-FR advisories

CERTFR-2021-AVI-724 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:vmware:vcenter_server:6.7:-:*:*:*:*:*:*

Affected products

Product	Versions
VMware vCenter Server, VMware Cloud Foundation	affected VMware vCenter Server(6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation 3.x before 3.10.2.2

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD