Language: PHP
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:
    private function isMimeTypeAllowed($file_path) {

        $finfo = finfo_open(FILEINFO_MIME_TYPE);

        $file_mime = finfo_file($finfo, $file_path);

        if($file_mime === false){ return false; }

        return in_array($file_mime, $this->allowed_mime);

    }