CVE-2020-2169Network attack vector

Reflected XSS via unescaped validation parameter

Published Mar 25, 2020 · Updated Aug 4, 2024

Reflected XSS in Jenkins Queue cleanup Plugin 1.3 and earlier allows remote attackers to execute script via a crafted validation request. A form-validation HTTP endpoint inserts a query parameter into an error message without escaping it for HTML output. Exploitation requires user interaction with the crafted request, after which the injected script runs in that user's browser under the Jenkins origin.

CVSS severity6.1
Medium
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Jenkins Queue cleanup Plugin 1.3 and earlier allows remote attackers to execute script via a crafted validation request. A form-validation HTTP endpoint inserts a query parameter into an error message without escaping it for HTML output. Exploitation requires user interaction with the crafted request, after which the injected script runs in that user's browser under the Jenkins origin.

The record

CVE
CVE-2020-2169
Published
Mar 25, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
Jenkins Queue cleanup Plugin
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Jenkins Queue cleanup Pluginversion=unspecified <=1.3

Published CVSS scores

6.1GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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