CVE-2022-41240 in Walti Plugin
Summary
by MITRE • 09/21/2022
Jenkins Walti Plugin 1.0.1 and earlier does not escape the information provided by the Walti API, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide malicious API responses from Walti.
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Analysis
by VulDB Data Team • 05/28/2025
The vulnerability identified as CVE-2022-41240 affects the Jenkins Walti Plugin version 1.0.1 and earlier, presenting a critical stored cross-site scripting flaw that arises from insufficient output escaping of data retrieved from the Walti API. This issue creates a pathway for attackers to execute malicious scripts within the context of a victim's browser when the plugin processes responses from the Walti service. The vulnerability specifically stems from the plugin's failure to properly sanitize or escape data received from external API sources, allowing malicious payloads to be stored and subsequently executed when users interact with the plugin's interface.
The technical flaw manifests when the Jenkins Walti Plugin retrieves data from the Walti API and displays it within the Jenkins user interface without adequate input validation or output sanitization. This stored XSS vulnerability occurs because the plugin treats external API responses as trusted content without implementing proper HTML escaping mechanisms. Attackers who can compromise the Walti API or manipulate API responses can inject malicious JavaScript code that persists within the plugin's data storage. When other users access the affected Jenkins interface, their browsers execute the stored malicious scripts, potentially leading to session hijacking, credential theft, or further exploitation of the Jenkins environment.
The operational impact of this vulnerability extends beyond simple script execution, as it represents a significant security risk to Jenkins environments that rely on the Walti plugin for integration with external authentication or authorization services. Attackers could leverage this vulnerability to escalate privileges within the Jenkins system, potentially gaining access to sensitive build configurations, source code repositories, or administrative functions. The stored nature of the XSS vulnerability means that malicious payloads remain active until the affected plugin is updated or the stored data is cleared, creating an ongoing threat vector. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in software applications, and represents a classic example of insecure data handling in web applications.
Organizations utilizing Jenkins with the Walti plugin should prioritize immediate remediation through plugin updates to versions that properly escape API responses and implement comprehensive input validation. The mitigation strategy should include updating to the latest plugin version that addresses the XSS vulnerability, implementing network-level restrictions to prevent unauthorized access to the Walti API, and conducting thorough security reviews of all Jenkins plugins that interface with external services. Security teams should also consider implementing web application firewalls and monitoring for suspicious API interactions that might indicate attempted exploitation of this vulnerability. The ATT&CK framework categorizes this vulnerability under T1059.007 for scripting languages and T1566 for malicious code injection techniques, emphasizing the need for layered defensive measures. Additionally, implementing proper input sanitization and output encoding practices throughout the Jenkins ecosystem will help prevent similar vulnerabilities in other plugins and components that process external data sources.