CVE-2025-31720 in Jenkins
Summary
by MITRE • 04/02/2025
A missing permission check in Jenkins 2.503 and earlier, LTS 2.492.2 and earlier allows attackers with Computer/Create permission but without Computer/Extended Read permission to copy an agent, gaining access to its configuration.
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Analysis
by VulDB Data Team • 04/03/2025
This vulnerability resides in the Jenkins continuous integration and delivery platform where a critical permission oversight exists in versions up to 2.503 and LTS 2.492.2. The flaw manifests as a missing permission check that allows unauthorized access to agent configurations through a seemingly benign operation. Attackers with the specific Computer/Create permission can exploit this weakness to copy agents, thereby obtaining sensitive configuration details that should be restricted to users with proper Computer/Extended Read permissions.
The technical implementation of this vulnerability stems from inadequate access control validation within Jenkins' agent management subsystem. When a user attempts to copy an agent, the system should verify that the user possesses sufficient privileges to access the target agent's configuration data. However, this validation step is absent or improperly implemented, creating an access bypass scenario. The vulnerability directly maps to CWE-284 which describes improper access control mechanisms and aligns with ATT&CK technique T1078.101 related to valid accounts with elevated privileges through credential manipulation.
The operational impact of this vulnerability is significant as it enables attackers to gain unauthorized access to agent configurations that may contain sensitive information such as credentials, environment variables, and execution parameters. This access can lead to further exploitation opportunities including privilege escalation, lateral movement within the CI/CD environment, and potential compromise of build processes. The vulnerability essentially allows attackers to obtain information about other agents in the system without proper authorization, potentially exposing the entire agent infrastructure to unauthorized inspection and manipulation.
Organizations running affected Jenkins versions should immediately implement the recommended mitigations including upgrading to patched versions where available, implementing additional access controls, and monitoring for unauthorized agent copying activities. The recommended approach involves enforcing stricter permission boundaries and ensuring that all agent-related operations properly validate user privileges against the target resource. Security teams should also consider implementing network segmentation and monitoring solutions to detect anomalous agent copying behavior that could indicate exploitation attempts. This vulnerability demonstrates the critical importance of comprehensive permission validation in distributed systems where multiple users interact with shared resources and highlights the need for regular security assessments of access control mechanisms in enterprise CI/CD platforms.