How severe is CVE-2021-22113?

CVE-2021-22113 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-22113 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22113?

CVE-2021-22113 affects Vmware Spring Cloud Netflix Zuul. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22113?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22113 published?

CVE-2021-22113 was published on 2021-02-23 and last updated on 2026-06-17.

CVE-2021-22113

CVE-2021-22113 is a medium-severity vulnerability in Vmware Spring Cloud Netflix Zuul with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Vmware Spring Cloud Netflix Zuul
Published: 2021-02-23
Last modified: 2026-06-17

Description

Applications using the “Sensitive Headers” functionality in Spring Cloud Netflix Zuul 2.2.6.RELEASE and below may be vulnerable to bypassing the “Sensitive Headers” restriction when executing requests with specially constructed URLs. Applications that use Spring Security's StrictHttpFirewall (enabled by default for all URLs) are not affected by the vulnerability, as they reject requests that allow bypassing.

Frequently asked questions

What is CVE-2021-22113?: Applications using the “Sensitive Headers” functionality in Spring Cloud Netflix Zuul 2.2.6.RELEASE and below may be vulnerable to bypassing the “Sensitive Headers” restriction when executing requests with specially constructed URLs. Applications that use Spring Security's StrictHttpFirewall (enabled by default for all URLs) are not affected by the vulnerability, as they reject requests that allow bypassing.
How severe is CVE-2021-22113?: CVE-2021-22113 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-22113 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22113?: CVE-2021-22113 affects Vmware Spring Cloud Netflix Zuul. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22113?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22113 published?: CVE-2021-22113 was published on 2021-02-23 and last updated on 2026-06-17.

References

https://tanzu.vmware.com/security/cve-2021-22113

Affected products (1)

cpe:2.3:a:vmware:spring_cloud_netflix_zuul:*:*:*:*:*:*:*:*

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