Sandbox protection in Jenkins Pipeline: Groovy Plugin 2.78 and earlier can be circumvented through default parameter expressions in CPS-transformed methods.
www.openwall.com/lists/oss-security/2020/02/12/3
github.com/jenkinsci/workflow-cps-plugin/commit/41cb4e05eed6a901d0c8a8b0a460111a64c5e179
github.com/jenkinsci/workflow-cps-plugin/commit/90b7f403882e1cab1dec49a011e377f440f8e003
jenkins.io/security/advisory/2020-02-12/#SECURITY-1710
nvd.nist.gov/vuln/detail/CVE-2020-2109