How severe is CVE-2021-22101?

CVE-2021-22101 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22101 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22101?

CVE-2021-22101 primarily affects Cloudfoundry Capi-release. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22101?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22101 published?

CVE-2021-22101 was published on 2021-10-27 and last updated on 2026-06-17.

CVE-2021-22101

CVE-2021-22101 is a high-severity vulnerability in Cloudfoundry Capi-release with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Cloudfoundry Capi-release
Published: 2021-10-27
Last modified: 2026-06-17

Description

Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerability allowing unauthenticated attackers to cause denial of service by using REST HTTP requests with label_selectors on multiple V3 endpoints by generating an enormous SQL query.

Frequently asked questions

What is CVE-2021-22101?: Cloud Controller versions prior to 1.118.0 are vulnerable to unauthenticated denial of Service(DoS) vulnerability allowing unauthenticated attackers to cause denial of service by using REST HTTP requests with label_selectors on multiple V3 endpoints by generating an enormous SQL query.
How severe is CVE-2021-22101?: CVE-2021-22101 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22101 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22101?: CVE-2021-22101 primarily affects Cloudfoundry Capi-release. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22101?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22101 published?: CVE-2021-22101 was published on 2021-10-27 and last updated on 2026-06-17.

References

https://www.cloudfoundry.org/blog/cve-2021-22101-cloud-controller-is-vulnerable-to-unauthenticated-denial-of-service/

Affected products (2)

cpe:2.3:a:cloudfoundry:capi-release:*:*:*:*:*:*:*:*
cpe:2.3:a:cloudfoundry:cf-deployment:*:*:*:*:*:*:*:*

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