CVE-2025-47886 is a medium-severity security vulnerability identified in the Jenkins Cadence vManager Plugin, version 4.0.1-286.v9e25a_740b_a_48 and earlier. The vulnerability is classified as a Cross-Site Request Forgery (CSRF) issue (CWE-352), which allows an attacker to trick an authenticated Jenkins user into executing unwanted actions without their consent. Specifically, this flaw enables an attacker to cause the vulnerable plugin to connect to an attacker-specified URL using attacker-supplied credentials (username and password). The vulnerability requires that the attacker have network access to the Jenkins instance and that the victim user has at least limited privileges (PR:L) on the Jenkins server. The CVSS v3.1 base score is 4.3, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). The vulnerability does not require user interaction, but it does require that the attacker have some level of privileges on the Jenkins server, which limits the attack surface to insiders or attackers who have already compromised some credentials. There are no known exploits in the wild at the time of publication, and no patches have been linked yet. The vulnerability could be leveraged to perform unauthorized actions on behalf of the user, potentially leading to integrity violations such as unauthorized configuration changes or triggering malicious workflows. Given Jenkins' widespread use in continuous integration and deployment pipelines, exploitation could disrupt software development processes or introduce malicious code into builds if leveraged in a chained attack scenario.

For European organizations, the impact of this vulnerability can be significant, especially for those relying heavily on Jenkins for their DevOps and CI/CD pipelines. Unauthorized connections to attacker-controlled URLs using attacker-specified credentials could lead to integrity breaches in build and deployment processes, potentially allowing attackers to inject malicious code or disrupt software delivery. This could result in compromised software products, intellectual property theft, or operational disruptions. The medium severity and requirement for some privileges mean that the threat is more pronounced in environments with weak internal access controls or where Jenkins instances are exposed to broader internal networks. Organizations in sectors with stringent regulatory requirements (e.g., finance, healthcare, critical infrastructure) could face compliance risks if this vulnerability leads to unauthorized changes or data integrity issues. Additionally, the lack of known exploits currently provides a window for proactive mitigation before widespread exploitation occurs.

European organizations should implement the following specific mitigation measures: 1) Immediately review and restrict Jenkins user privileges to the minimum necessary, ensuring that only trusted users have access to the Jenkins Cadence vManager Plugin functionalities. 2) Isolate Jenkins servers within secure network segments, limiting access to trusted internal IP ranges and employing network-level controls such as firewalls and VPNs to reduce exposure. 3) Monitor Jenkins logs and audit trails for unusual or unauthorized requests that attempt to connect to external URLs or use unexpected credentials. 4) Employ web application firewalls (WAFs) with CSRF protection rules to detect and block suspicious cross-site requests targeting Jenkins interfaces. 5) Until an official patch is released, consider disabling or uninstalling the Jenkins Cadence vManager Plugin if it is not critical to operations. 6) Educate Jenkins users about the risks of CSRF and encourage best practices such as logging out of Jenkins sessions when not in use and avoiding clicking on suspicious links while authenticated. 7) Stay updated with Jenkins security advisories and apply patches promptly once available.