CVE-2025-64148 identifies a security vulnerability in the Jenkins Publish to Bitbucket Plugin versions 0.4 and earlier, where a missing permission check allows users with Overall/Read permissions to enumerate credential IDs stored within Jenkins. Jenkins is a widely used open-source automation server for continuous integration and delivery, and the Publish to Bitbucket Plugin facilitates integration with Bitbucket repositories. The vulnerability arises because the plugin fails to enforce proper authorization controls when accessing credential identifiers, enabling attackers with minimal privileges to list credentials IDs. Although the vulnerability does not directly expose credential secrets, enumerating credential IDs can assist attackers in reconnaissance and potentially facilitate further attacks, such as targeted credential theft or privilege escalation. This vulnerability does not require user interaction and can be exploited by any authenticated user with read access, which is often granted to many users in development environments. No CVSS score has been assigned yet, and no public exploits have been reported. However, the impact on confidentiality is significant since credential identifiers are sensitive metadata that can aid attackers in crafting more effective attacks. The integrity and availability impacts are limited in this context. The plugin version affected is specifically 0.4 and earlier, and no patches or updates have been linked yet, indicating the need for vigilance and proactive mitigation by Jenkins administrators.

For European organizations, the primary impact of CVE-2025-64148 is the potential exposure of credential identifiers used in Jenkins environments. This exposure can facilitate attacker reconnaissance, enabling them to identify which credentials are stored and potentially target those credentials for theft or misuse. Given Jenkins' widespread use in software development and continuous integration pipelines, especially in technology-driven European countries, this vulnerability could lead to unauthorized access to source code repositories, deployment pipelines, or other critical infrastructure integrated with Jenkins. The compromise of credentials could result in data breaches, intellectual property theft, or disruption of software delivery processes. Organizations with large development teams or those using Jenkins in regulated sectors (e.g., finance, healthcare) may face increased risk and compliance implications. Although the vulnerability does not directly disclose credential secrets, the enumeration capability lowers the barrier for attackers to perform more sophisticated attacks. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability becomes widely known.

To mitigate CVE-2025-64148, European organizations should implement the following specific measures: 1) Restrict Overall/Read permissions in Jenkins to only trusted users and regularly audit permission assignments to minimize exposure. 2) Monitor Jenkins logs for unusual credential enumeration activities or access patterns that could indicate exploitation attempts. 3) Apply updates or patches from the Jenkins project as soon as they become available for the Publish to Bitbucket Plugin; if no patch is currently available, consider disabling or removing the plugin temporarily. 4) Review and harden credential storage policies, ensuring that credentials are encrypted and access is tightly controlled. 5) Employ network segmentation and access controls to limit Jenkins server exposure to only necessary personnel and systems. 6) Educate development and operations teams about the risks associated with credential enumeration and the importance of least privilege principles. 7) Consider implementing multi-factor authentication for Jenkins access to reduce the risk of compromised accounts being leveraged to exploit this vulnerability.