A data modification vulnerability exists in Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in User.java, IdStrategy.java that allows attackers to submit crafted user names that can cause an improper migration of user record storage formats, potentially preventing the victim from logging into Jenkins.
www.securityfocus.com/bid/106176
access.redhat.com/errata/RHBA-2019:0024
github.com/jenkinsci/jenkins
github.com/jenkinsci/jenkins/commit/4ed66e5838476e575a83c3cd13fffb37eefa2f48
github.com/jenkinsci/jenkins/commit/7bae6dd6ef23af988801d38dc0f8f693bc6283f8
jenkins.io/security/advisory/2018-12-05/#SECURITY-1072
nvd.nist.gov/vuln/detail/CVE-2018-1000863
www.tenable.com/security/research/tra-2018-43