Jenkins File Parameter Plugin 285.v757c5b67ac25 and earlier does not restrict the name (and resulting uploaded file name) of Stashed File Parameters.
This allows attackers with Item/Configure permission to create or replace arbitrary files on the Jenkins controller file system with attacker-specified content.
File Parameter Plugin 285.287.v4b7b29d3469d restricts the name (and resulting uploaded file name) of Stashed File Parameters.
io.jenkins.plugins:file-parameters