Package Instance

Improper Input Validation
If an application passes unvalidated user input as the file for which MIME type validation should occur, then arbitrary arguments are passed to the underlying file command.

Symfony's incorrect parsing of PATH_INFO can lead to limited authorization bypass
The `Request` class improperly interprets some `PATH_INFO` in a way that leads to representing some URLs with a path that doesn't start with a `/`. This can allow bypassing some access control rules that are built with this `/`-prefix assumption.

Information Exposure
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that status codes are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist.

Symfony vulnerable to open redirect via browser-sanitized URLs
The `Request` class, does not parse URI with special characters the same way browsers do. As a result, an attacker can trick a validator relying on the `Request` class to redirect users to another domain.