CVE-2024-29800: timber/timber vulnerable to Deserialization of Untrusted Data

Timber is vulnerable to PHAR deserialization due to a lack of checking the input before passing it into the file_exists() function. If an attacker can upload files of any type to the server, he can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution especially when Timber is used with frameworks with documented POP chains like Wordpress/ vulnerable developer code.