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:
function strip_request_tags($name, $default_value = null)
{
    $request = request();
    if ($request->has($name)) {
        return strip_tags($request->input($name));
    }

    return $default_value;
}