Versions of the package spatie/browsershot before 5.0.1 are vulnerable to Improper Input Validation due to improper URL validation through the setUrl method. An attacker can exploit this vulnerability by using leading whitespace (%20) before the file:// protocol, resulting in Local File Inclusion, which allows the attacker to read sensitive files on the server.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.