DOMPDF Arbitrary File Read
dompdf.php in dompdf before 0.6.1, when `DOMPDF_ENABLE_PHP` is enabled, allows context-dependent attackers to bypass chroot protections and read arbitrary files via a PHP protocol and wrappers in the input_file parameter, as demonstrated by a `php://filter/read=convert.base64-encode/resource` in the input_file parameter.