CVE-2020-2176Network attack vector

Cross-site scripting via unescaped validation responses

Published Apr 7, 2020 · Updated Aug 4, 2024

Cross-site scripting in Jenkins useMango Runner Plugin 1.4 and earlier allows attackers to execute script through useMango responses. Multiple form-validation endpoints insert values returned by the useMango service into validation messages without HTML escaping. Exploitation requires control over service-returned values and a Jenkins user to view an affected validation response, enabling script execution in that user’s browser.

CVSS severity5.4
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Jenkins useMango Runner Plugin 1.4 and earlier allows attackers to execute script through useMango responses. Multiple form-validation endpoints insert values returned by the useMango service into validation messages without HTML escaping. Exploitation requires control over service-returned values and a Jenkins user to view an affected validation response, enabling script execution in that user’s browser.

The record

CVE
CVE-2020-2176
Published
Apr 7, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
useMango Runner Plugin
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 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 <=1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · useMango Runner Pluginversion=unspecified <=1.4

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
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.

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Technologies

Your stack

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Your stack

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