CVE-2023-27898Network attack vector

Stored XSS via unescaped plugin dependency version

Published Mar 8, 2023 · Updated Feb 28, 2025

Stored XSS in Jenkins 2.270 through 2.393 and LTS 2.277.1 through 2.375.3 allows remote attackers to run script in a user's browser. The plugin manager inserts a plugin's required Jenkins version into an incompatibility error without escaping the value. Exploitation requires attacker-controlled plugin metadata at a configured update site and a user viewing the resulting message; installation is unnecessary.

CVSS severity9.6
Critical
EPSS probability1.84%
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 2.270 through 2.393 and LTS 2.277.1 through 2.375.3 allows remote attackers to run script in a user's browser. The plugin manager inserts a plugin's required Jenkins version into an incompatibility error without escaping the value. Exploitation requires attacker-controlled plugin metadata at a configured update site and a user viewing the resulting message; installation is unnecessary.

The record

CVE
CVE-2023-27898
Published
Mar 8, 2023
Updated
Feb 28, 2025
Vendor
Jenkins Project
Product
Jenkins
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record 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=2.270 <2.* changes=[{"at":"2.375.4","status":"unaffected"},{"at":"2.376","status":"affected"},{"at":"2.387.1","status":"unaffected"},{"at":"2.388","status":"affected"},{"at":"2.394","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Jenkinsversion=2.270 <2.* changes=[{"at":"2.375.4","status":"unaffected"},{"at":"2.376","status":"affected"},{"at":"2.387.1","status":"unaffected"},{"at":"2.388","status":"affected"},{"at":"2.394","status":"unaffected"}]

Published CVSS scores

9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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