CVE-2026-42524: Vulnerability in Jenkins Project Jenkins HTML Publisher Plugin
A stored cross-site scripting (XSS) vulnerability exists in Jenkins HTML Publisher Plugin version 427 and earlier. The vulnerability arises because the plugin does not properly escape the job name and URL in the legacy wrapper file. Exploitation requires the attacker to have Item/Configure permission within Jenkins. There is no confirmed patch or official remediation guidance available at this time. No known exploits in the wild have been reported. The vulnerability could allow an attacker with sufficient permissions to inject malicious scripts that execute in the context of users viewing the affected pages.
AI Analysis
Technical Summary
CVE-2026-42524 is a stored XSS vulnerability in Jenkins HTML Publisher Plugin versions 427 and earlier. The issue occurs due to improper escaping of job name and URL in the legacy wrapper file, enabling attackers with Item/Configure permissions to inject malicious scripts. This vulnerability is specific to the Jenkins HTML Publisher Plugin and requires authenticated access with configuration privileges. No CVSS score or vendor remediation details are currently available.
Potential Impact
If exploited, this vulnerability could allow an attacker with Item/Configure permissions to execute arbitrary JavaScript in the context of Jenkins users who view the affected pages. This could lead to session hijacking, unauthorized actions, or other malicious activities within the Jenkins environment. However, exploitation requires elevated permissions, limiting the scope to users who already have some level of trusted access.
Mitigation Recommendations
Patch status is not yet confirmed — check the Jenkins Project advisory for current remediation guidance. Until an official fix is released, restrict Item/Configure permissions to trusted users only to reduce the risk of exploitation. Monitor Jenkins plugin updates and apply any released patches promptly.
CVE-2026-42524: Vulnerability in Jenkins Project Jenkins HTML Publisher Plugin
Description
A stored cross-site scripting (XSS) vulnerability exists in Jenkins HTML Publisher Plugin version 427 and earlier. The vulnerability arises because the plugin does not properly escape the job name and URL in the legacy wrapper file. Exploitation requires the attacker to have Item/Configure permission within Jenkins. There is no confirmed patch or official remediation guidance available at this time. No known exploits in the wild have been reported. The vulnerability could allow an attacker with sufficient permissions to inject malicious scripts that execute in the context of users viewing the affected pages.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42524 is a stored XSS vulnerability in Jenkins HTML Publisher Plugin versions 427 and earlier. The issue occurs due to improper escaping of job name and URL in the legacy wrapper file, enabling attackers with Item/Configure permissions to inject malicious scripts. This vulnerability is specific to the Jenkins HTML Publisher Plugin and requires authenticated access with configuration privileges. No CVSS score or vendor remediation details are currently available.
Potential Impact
If exploited, this vulnerability could allow an attacker with Item/Configure permissions to execute arbitrary JavaScript in the context of Jenkins users who view the affected pages. This could lead to session hijacking, unauthorized actions, or other malicious activities within the Jenkins environment. However, exploitation requires elevated permissions, limiting the scope to users who already have some level of trusted access.
Mitigation Recommendations
Patch status is not yet confirmed — check the Jenkins Project advisory for current remediation guidance. Until an official fix is released, restrict Item/Configure permissions to trusted users only to reduce the risk of exploitation. Monitor Jenkins plugin updates and apply any released patches promptly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- jenkins
- Date Reserved
- 2026-04-28T09:24:35.049Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f20cdfcbff5d8610181a8d
Added to database: 4/29/2026, 1:51:27 PM
Last enriched: 4/29/2026, 2:06:36 PM
Last updated: 4/29/2026, 3:05:04 PM
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.