CVE-2025-64140 is a security vulnerability identified in the Jenkins Azure CLI Plugin versions 0.9 and earlier. The root cause is the plugin's failure to restrict the shell commands it executes on the Jenkins controller. Specifically, the plugin allows users with Item/Configure permission within Jenkins to execute arbitrary shell commands, effectively enabling command injection. This permission level is typically granted to users who can configure jobs or items in Jenkins, which may include developers or administrators. The vulnerability arises because the plugin does not sanitize or restrict the commands passed to the Azure CLI, allowing malicious actors to inject and execute arbitrary commands on the Jenkins controller host. This can lead to full compromise of the Jenkins server, including unauthorized access to sensitive data, modification of build pipelines, and disruption of CI/CD processes. Although no public exploits have been reported yet, the vulnerability is critical due to the high privileges it can grant and the central role Jenkins plays in software development workflows. The vulnerability was published on October 29, 2025, and no CVSS score has been assigned yet. The absence of a patch link suggests that a fix may still be pending or in development. The Jenkins controller is a high-value target because it orchestrates build and deployment pipelines, making this vulnerability particularly dangerous if exploited.

For European organizations, the impact of this vulnerability can be severe. Jenkins is widely used across Europe for continuous integration and continuous deployment (CI/CD), and many organizations integrate it with Azure cloud services for scalability and automation. Exploitation could lead to unauthorized command execution on the Jenkins controller, resulting in potential data breaches, pipeline sabotage, and disruption of software delivery. This could affect confidentiality by exposing sensitive source code and credentials, integrity by allowing attackers to alter build configurations or inject malicious code, and availability by causing denial of service or pipeline failures. Organizations in sectors with stringent regulatory requirements, such as finance, healthcare, and critical infrastructure, could face compliance violations and reputational damage. The requirement for Item/Configure permission means that insider threats or compromised user accounts could be leveraged to exploit this vulnerability. Given the central role of Jenkins in development workflows, the operational impact could be widespread and long-lasting.

To mitigate this vulnerability, European organizations should immediately review and restrict Item/Configure permissions in Jenkins to only trusted users, minimizing the attack surface. Until a patch is released, avoid using the vulnerable versions of the Jenkins Azure CLI Plugin or disable the plugin if feasible. Implement strict access controls and multi-factor authentication (MFA) for Jenkins accounts with elevated permissions. Monitor Jenkins controller logs and command execution activity for suspicious behavior indicative of exploitation attempts. Network segmentation should be applied to isolate Jenkins controllers from critical infrastructure where possible. Once a patch or updated plugin version is available, prioritize its deployment across all Jenkins instances. Additionally, conduct regular security audits of Jenkins configurations and plugins to detect and remediate similar risks proactively. Educate development and operations teams about the risks associated with plugin permissions and secure plugin management practices.