Jenkins 2.274 and earlier, LTS 2.263.1 and earlier allows reading arbitrary files using the file browser for workspaces and archived artifacts by following symlinks.
{ "severity": "Medium", "cpes": [ "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*", "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*" ] }