A vital cross-site scripting (XSS) vulnerability within the widespread Jenkins Gatling Plugin permits attackers to bypass Content material-Safety-Coverage (CSP) protections.
The vulnerability, tracked as CVE-2025-5806, impacts Gatling Plugin model 136.vb_9009b_3d33a_e and poses important dangers to Jenkins environments using this efficiency testing integration software.
The vulnerability stems from how Gatling Plugin 136.vb_9009b_3d33a_e serves Gatling efficiency testing reviews throughout the Jenkins setting.
The plugin fails to correctly implement Content material-Safety-Coverage restrictions that have been initially launched in Jenkins variations 1.641 and 1.625.3 as a basic safety measure towards XSS assaults.
Jenkins Gatling Plugin Vulnerability
Content material-Safety-Coverage (CSP) is a vital internet safety customary that helps forestall cross-site scripting assaults by controlling which sources may be loaded and executed by an online web page.
When correctly carried out, CSP acts as a defensive barrier that restricts the execution of unauthorized scripts, even when malicious content material is injected into the appliance.
Nevertheless, the Gatling Plugin’s present implementation bypasses these protections totally when rendering efficiency check reviews.
The vulnerability particularly manifests within the plugin’s report serving mechanism, the place user-controlled content material inside Gatling reviews may be leveraged to inject and execute malicious JavaScript code.
This bypass happens as a result of the plugin processes and shows report content material with out adequately implementing the CSP headers that may usually forestall such script execution.
The exploitation of this vulnerability requires customers with the power to switch Gatling report content material, which usually contains builders, QA engineers, and system directors with acceptable Jenkins permissions.
As soon as exploited, attackers can execute arbitrary JavaScript code throughout the context of the Jenkins software, doubtlessly resulting in session hijacking, credential theft, or unauthorized administrative actions.
The excessive CVSS severity ranking assigned to this vulnerability displays its potential for important influence on Jenkins’ infrastructure.
Profitable exploitation might allow attackers to govern Jenkins configurations, entry delicate construct data, modify deployment pipelines, or escalate privileges throughout the system.
Given Jenkins’ central position in lots of CI/CD environments, such a compromise might have cascading results throughout whole growth and deployment workflows.
Threat FactorsDetailsAffected ProductsJenkins Gatling Plugin variations ≤ 136.vb_9009b_3d33a_eImpact– Arbitrary script execution- Session/cookie theft- CSP bypass- Privilege escalation risksExploit Prerequisites1. Attacker has entry to switch the Gatling report content material. 2. The sufferer views a malicious report. 3. Unpatched Jenkins CSP implementationCVSS 3.1 Score8.1 (Excessive)
Mitigation
Jenkins’ safety staff has confirmed that no patches are presently obtainable for the affected Gatling Plugin model 136.vb_9009b_3d33a_e.
The advisory explicitly states that as of the publication date, there isn’t any repair for this vulnerability, representing an uncommon scenario the place Jenkins has disclosed a vulnerability with out an accompanying patch.
The first mitigation technique advisable by Jenkins entails downgrading to Gatling Plugin model 1.3.0, which isn’t affected by this vulnerability.
Organizations ought to instantly assess their Jenkins environments to determine installations operating the weak plugin model and plan for downgrade procedures.
Safety groups ought to implement extra monitoring for uncommon Jenkins exercise, notably specializing in report technology and viewing actions. Community segmentation and entry controls needs to be reviewed to restrict the publicity of Jenkins cases to untrusted customers.
Organizations unable to right away downgrade ought to think about quickly disabling the Gatling Plugin till a everlasting repair turns into obtainable.
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