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HIGH severity

CVE-2020-2123 — radargun

HIGHFix: jenkinsci/radargun-plugin@63aba3b

CVE-2020-2123 is a high-severity (CVSS 8.8) Deserialization of Untrusted Data vulnerability in org.jenkins-ci.plugins:radargun. A fix is available for org.jenkins-ci.plugins:radargun — see the affected versions and patch details below.

RCE vulnerability in RadarGun Plugin

Also known asGHSA-723p-9rcj-xv8j
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 29, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs83th percentile — riskier than 83% of all scored CVEsHighest risk
0.31%1.13%1.96%2.78%0.8%2.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.jenkins-ci.plugins:radargun

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

RadarGun Plugin 1.7 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types. This results in a remote code execution vulnerability exploitable by users able to configure RadarGun Plugin’s build step.

RadarGun Plugin 1.8 configures its YAML parser to only instantiate safe types.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:radargunall versions1.8org.jenkins-ci.plugins:radargun:1.8

Affected Products

1 product · 1 configurations
Application
radargunjenkins
≤ 1.7
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:radargun, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:radargun to 1.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-2123 is resolved across your whole dependency graph.

  3. Workarounds

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

RadarGun Plugin 1.7 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types. This results in a remote code execution vulnerability exploitable by users able to configure RadarGun Plugin’s build step. RadarGun Plugin 1.8 configures its YAML parser to only instantiate safe types.
O3 Security · Impact-Aware SCA

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CVE-2020-2123: radargun RCE — Fixed in 1.8