What is CVE-2021-22051?

CVE-2021-22051 is a medium-severity vulnerability in VMware Spring Cloud Gateway, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-11-08.

How severe is CVE-2021-22051?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in VMware Spring Cloud Gateway

CVE-2021-22051

Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream services. Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.5+, 2.2.x users should upgrade to 2.2.10.RELEASE or newer.

Vulnerability class: Broken Access Control

Published 2021-11-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

VMware Spring Cloud Gateway
Spring Cloud Gateway — versions 3.0.0 to 3.0.4, 2.2.0.RELEASE to 2.2.9.RELEASE, and older versions

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

tanzu.vmware.com/security/cve-2021-22051 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22051?: CVE-2021-22051 is a medium-severity vulnerability in VMware Spring Cloud Gateway, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-11-08.
How severe is CVE-2021-22051?: Medium severity. CVSS v3 base score is 6.5 out of 10.