What is CVE-2020-2161?

CVE-2020-2161 is a medium-severity vulnerability in Jenkins, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-03-25.

How severe is CVE-2020-2161?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-2161 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Jenkins

CVE-2020-2161

Jenkins 2.227 and earlier, LTS 2.204.5 and earlier does not properly escape node labels that are shown in the form validation for label expressions on job configuration pages, resulting in a stored XSS vulnerability exploitable by users able to define node labels.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (68.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Jenkins
Jenkins Project — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

jenkins.io/security/advisory/2020-03-25/ (Vendor Advisory)
www.openwall.com/lists/oss-security/2020/03/25/2 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-2161?: CVE-2020-2161 is a medium-severity vulnerability in Jenkins, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-03-25.
How severe is CVE-2020-2161?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-2161 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.