    def __init__(self):
        field_infos = [
            FieldInfo.factory(key)
            for key in list(request.form.keys()) + list(request.files.keys())
        ]
        # important to sort them so they will be in expected order on command line
        self.field_infos = list(sorted(field_infos))

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.