CVE-2015-8103: The Jenkins CLI subsystem in Jenkins before 1.638 and LTS before 1.625.2 allows remote attackers to execute...

Security readout for executives and security teams

This is a legacy Jenkins remote code execution flaw in the CLI subsystem. A reachable, unpatched Jenkins controller could let a remote attacker run code on the server through unsafe Java deserialization. Jenkins systems often hold build secrets and deployment access, so affected instances are business-critical. Exposure is most likely where old Jenkins controllers run versions before 1.638 or LTS before 1.625.2 and expose CLI/RMI access to untrusted networks. Internet-facing CI servers, shared build infrastructure, and vendor-packaged Jenkins deployments need priority review. Prioritize urgently if any legacy Jenkins instance remains reachable. CI systems can bridge source code, credentials, build artifacts, and deployment paths. If inventory confirms no affected versions, record the decision as historical risk closure. Mitigation focus: Upgrade Jenkins to 1.638, LTS 1.625.2, or a later supported release.; Apply relevant Red Hat security advisories if Jenkins came from Red Hat packaging.; Restrict or disable Jenkins CLI/RMI exposure according to Jenkins guidance..

Prepared

Jun 13, 2026, 21:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.