Language: JavaScript
Label: vulnerable
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
    this.onDocumentReady = function(){
        $('.custom-file-input').on('change',function(){
            $(this).next('.custom-file-label').text($(this).val().replace('C:\\fakepath\\', ''));
        });
    };