What is CVE-2020-2123?

CVE-2020-2123 is a high-severity vulnerability in Jenkins Radargun, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2020-02-12.

How severe is CVE-2020-2123?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Jenkins Radargun

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.

Vulnerability class: Insecure Deserialization

Published 2020-02-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Jenkins Radargun
Jenkins Project Radargun Plugin — versions unspecified

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

jenkins.io/security/advisory/2020-02-12/ (Vendor Advisory)
www.openwall.com/lists/oss-security/2020/02/12/3 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-2123?: CVE-2020-2123 is a high-severity vulnerability in Jenkins Radargun, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2020-02-12.
How severe is CVE-2020-2123?: High severity. CVSS v3 base score is 8.8 out of 10.