Exposure of Sensitive Information to an Unauthorized Actor Jenkins Script Security Plugin

In Jenkins Script Security Plugin version 1.36 and earlier, users with the ability to configure sandboxed Groovy scripts are able to use a type coercion feature in Groovy to create new File objects from strings. This allowed reading arbitrary files on the Jenkins master file system. Such a type coercion is now subject to sandbox protection and considered to be a call to the new File(String) constructor for the purpose of in-process script approval.