How severe is CVE-2020-2121?

CVE-2020-2121 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-2121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2121?

CVE-2020-2121 affects Jenkins Google Kubernetes Engine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2121?

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-2020-2121 published?

CVE-2020-2121 was published on 2020-02-12 and last updated on 2026-06-17.

CVE-2020-2121

CVE-2020-2121 is a high-severity vulnerability in Jenkins Google Kubernetes Engine with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Jenkins Google Kubernetes Engine
Published: 2020-02-12
Last modified: 2026-06-17

Description

Jenkins Google Kubernetes Engine Plugin 0.8.0 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability.

Frequently asked questions

What is CVE-2020-2121?: Jenkins Google Kubernetes Engine Plugin 0.8.0 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability.
How severe is CVE-2020-2121?: CVE-2020-2121 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-2121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2121?: CVE-2020-2121 affects Jenkins Google Kubernetes Engine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2121?: 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-2020-2121 published?: CVE-2020-2121 was published on 2020-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:google_kubernetes_engine:*:*:*:*:*:jenkins:*:*

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