CVE-2023-30520Network attack vector

Stored XSS via unrestricted repository homepage schemes

Published Apr 12, 2023 · Updated Feb 7, 2025

Stored XSS in Jenkins Project Quay.io trigger Plugin 0.1 and earlier allows attackers to execute browser script via crafted webhooks. The webhook handler stores a repository homepage URL without restricting its scheme, leaving a user-controlled executable URL in Jenkins output. Attackers must submit the payload and a Jenkins user must interact with the stored homepage link before script executes in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.48%
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 Project Quay.io trigger Plugin 0.1 and earlier allows attackers to execute browser script via crafted webhooks. The webhook handler stores a repository homepage URL without restricting its scheme, leaving a user-controlled executable URL in Jenkins output. Attackers must submit the payload and a Jenkins user must interact with the stored homepage link before script executes in that user's browser context.

The record

CVE
CVE-2023-30520
Published
Apr 12, 2023
Updated
Feb 7, 2025
Vendor
Jenkins Project
Product
Quay.io trigger
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 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=0 <=0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Jenkins Project · Quay.io triggerversion=0 <=0.1

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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