An improper input validation vulnerability exists in Jenkins versions 2.106 and earlier, and LTS 2.89.3 and earlier, that allows an attacker to access plugin resource files in the META-INF and WEB-INF directories that should not be accessible, if the Jenkins home directory is on a case-insensitive file system.
https://www.oracle.com/security-alerts/cpuapr2022.html
https://jenkins.io/security/advisory/2018-02-14/#SECURITY-717