The vulnerability identified as CVE-2025-64132 affects the Jenkins MCP Server Plugin, specifically versions 0.84.v50ca_24ef83f2 and earlier. The core issue is the absence of proper permission checks within multiple MCP tools embedded in the plugin. This security lapse enables attackers to initiate builds without authorization and retrieve sensitive details about job configurations and cloud environments managed through Jenkins. Since Jenkins is widely used for continuous integration and continuous deployment (CI/CD), unauthorized build triggering can disrupt development workflows, potentially injecting malicious code or causing service interruptions. Additionally, unauthorized access to job and cloud configuration data can expose sensitive infrastructure details, increasing the risk of further targeted attacks. The vulnerability does not require authentication, which lowers the barrier for exploitation. No CVSS score has been assigned yet, and no known exploits have been reported in the wild. However, the nature of the vulnerability suggests a significant risk to confidentiality and integrity within affected environments. The plugin’s affected version list indicates that all versions up to 0.84.v50ca_24ef83f2 are vulnerable, emphasizing the need for prompt remediation. The Jenkins MCP Server Plugin is a component used in managing multi-cloud projects, making this vulnerability particularly relevant for organizations leveraging cloud-native CI/CD pipelines.

For European organizations, this vulnerability poses a substantial risk to the security and reliability of their software development lifecycle. Unauthorized build triggering can lead to the introduction of malicious code, potentially compromising deployed applications and services. Exposure of job and cloud configuration information can facilitate further attacks by revealing infrastructure details, credentials, or sensitive operational parameters. This can result in data breaches, service outages, and loss of intellectual property. Organizations in sectors such as finance, telecommunications, manufacturing, and critical infrastructure, which rely heavily on Jenkins for automated deployments, are especially vulnerable. The lack of authentication requirement increases the attack surface, making public-facing Jenkins instances a prime target. Disruption of CI/CD pipelines can also delay software releases, impacting business operations and competitiveness. The confidentiality and integrity of development and deployment processes are at risk, which could have cascading effects on supply chains and customer trust.

1. Immediately audit Jenkins instances to identify the use of the MCP Server Plugin and verify the installed version. 2. Apply vendor patches or updates as soon as they become available to address this vulnerability. 3. Restrict network access to Jenkins servers, limiting exposure to trusted internal networks or VPNs only. 4. Implement strict access controls and role-based permissions within Jenkins to minimize the impact of potential exploitation. 5. Monitor Jenkins logs for unusual build triggers or access patterns that could indicate exploitation attempts. 6. Employ Web Application Firewalls (WAFs) or reverse proxies with security rules to detect and block unauthorized requests targeting Jenkins endpoints. 7. Conduct regular security assessments and penetration tests focusing on CI/CD environments to identify and remediate similar issues proactively. 8. Educate development and operations teams about the risks associated with plugin vulnerabilities and the importance of timely updates.