CVE-2020-2137Network attack vector

Stored XSS via unsanitized timestamp HTML formatting

Published Mar 9, 2020 · Updated Aug 4, 2024

Stored XSS in Jenkins Timestamper Plugin 1.11.1 and earlier allows remote authenticated users to run script in viewers' browsers. The timestamp-display path inserts administrator-controlled HTML formatting into build console output without escaping or sanitizing it. Overall/Administer permission is required to store the format, and script runs only when another user views the affected console output.

CVSS severity4.8
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

Stored XSS in Jenkins Timestamper Plugin 1.11.1 and earlier allows remote authenticated users to run script in viewers' browsers. The timestamp-display path inserts administrator-controlled HTML formatting into build console output without escaping or sanitizing it. Overall/Administer permission is required to store the format, and script runs only when another user views the affected console output.

The record

CVE
CVE-2020-2137
Published
Mar 9, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
Jenkins Timestamper Plugin
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 9, 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 <=1.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Jenkins Project · Jenkins Timestamper Pluginversion=unspecified <=1.11.1

Published CVSS scores

4.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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