How severe is CVE-2020-2123?

CVE-2020-2123 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-2020-2123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2123?

CVE-2020-2123 affects Jenkins Radargun. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2123?

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-2020-2123 published?

CVE-2020-2123 was published on 2020-02-12 and last updated on 2026-06-17.

CVE-2020-2123

CVE-2020-2123 is a high-severity vulnerability in Jenkins Radargun 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. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Jenkins Radargun
Published: 2020-02-12
Last modified: 2026-06-17

Description

Jenkins RadarGun Plugin 1.7 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-2020-2123?: Jenkins RadarGun Plugin 1.7 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-2020-2123?: CVE-2020-2123 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-2020-2123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2123?: CVE-2020-2123 affects Jenkins Radargun. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2123?: 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-2020-2123 published?: CVE-2020-2123 was published on 2020-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:radargun:*:*:*:*:*:jenkins:*:*

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