CVE-2026-70439 in XML Job to Job DSL Plugin
Summary
by MITRE • 08/05/2026
Jenkins XML Job to Job DSL Plugin 0.1.13 and earlier does not perform permission checks, allowing attackers lacking appropriate permissions to invoke the conversion functionality.
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Analysis
by VulDB Data Team • 08/05/2026
This vulnerability exists within the Jenkins XML Job to Job DSL Plugin version 0.1.13 and earlier, where the plugin fails to implement proper authorization checks during the conversion process from XML job configurations to Job DSL scripts. The flaw allows unauthenticated or unauthorized users to exploit the conversion functionality without possessing the necessary administrative privileges typically required for such operations. This represents a critical permission bypass vulnerability that directly violates the principle of least privilege and could enable attackers to extract sensitive configuration information from Jenkins environments.
The technical nature of this vulnerability stems from the absence of access control validation within the plugin's conversion logic. When users submit XML job configurations for conversion to Job DSL format, the system should verify that the requesting user possesses sufficient permissions to perform this operation. However, the plugin implementation lacks such checks, enabling any attacker who can reach the conversion endpoint to execute the functionality regardless of their role or access level within the Jenkins instance. This flaw operates at the application layer and affects the authentication and authorization mechanisms inherent to the Jenkins security model.
The operational impact of this vulnerability is significant as it provides attackers with a potential pathway for information disclosure and privilege escalation. An attacker could leverage this vulnerability to convert XML job configurations into Job DSL scripts, potentially exposing sensitive build parameters, credential references, or other confidential information contained within job definitions. The converted DSL scripts might reveal internal network structures, service endpoints, or authentication mechanisms that could be used in subsequent attacks. This vulnerability directly relates to CWE-285 - Improper Authorization and falls under ATT&CK technique T1078 - Valid Accounts, as it allows unauthorized access to privileged functionality through legitimate plugin interfaces.
Organizations should immediately upgrade to a patched version of the Jenkins XML Job to Job DSL Plugin where proper permission checks have been implemented. Administrators should also review existing job configurations and access controls within their Jenkins environments to ensure that unauthorized users cannot reach the vulnerable conversion endpoints. Network segmentation and authentication hardening measures can provide additional defense-in-depth layers while the primary fix is implemented. The vulnerability highlights the importance of implementing comprehensive access control validation for all plugin functionalities, particularly those involving configuration manipulation or data extraction operations. Security teams should monitor Jenkins instances for any unusual activity related to job conversion processes and ensure that proper audit logging is enabled to track such potentially malicious activities.
This vulnerability demonstrates how seemingly innocuous plugin features can create security risks when proper authorization controls are omitted from the implementation. The flaw emphasizes the critical need for security reviews of all Jenkins plugins, particularly those that handle sensitive configuration data or provide administrative functionality. Organizations should also consider implementing automated security scanning tools that can identify missing permission checks in their Jenkins environments, as this type of vulnerability often goes undetected during routine testing procedures due to its indirect nature and reliance on specific plugin interfaces rather than core system components.