Jenkins Credentials Plugin 2.1.18 and earlier allowed users with permission to create or update credentials to confirm the existence of files on the Jenkins master with an attacker-specified path, and obtain the certificate content of files containing a PKCS#12 certificate.
seclists.org/fulldisclosure/2019/May/39
www.openwall.com/lists/oss-security/2019/05/21/1
www.securityfocus.com/bid/108462
access.redhat.com/errata/RHBA-2019:1605
access.redhat.com/errata/RHSA-2019:1636
github.com/jenkinsci/credentials-plugin/commit/40d0b5cc53c265b601ffaa4469310fad390a80fb
jenkins.io/security/advisory/2019-05-21/#SECURITY-1322
nvd.nist.gov/vuln/detail/CVE-2019-10320
wwws.nightwatchcybersecurity.com/2019/05/23/exploring-the-file-system-via-jenkins-credentials-plugin-vulnerability-cve-2019-10320