symfony/symfony is a PHP framework for web applications and a set of reusable PHP components.
Affected versions of this package are vulnerable to Arbitrary Code Execution. Provided file paths were not being properly escaped before being used in the
FileBinaryMimeTypeGuesser resulting in potential argument injection through the provided
symfony/symfony to version 2.8.52, 3.4.35, 4.2.11, 4.3.8 or higher.