eWebEditorNet vulnerability upload. aspx-vulnerability warning-the black bar safety net

eWebEditorNet is mainly a upload. aspx file there upload vulnerability. Principle: Code 1. form id="post" encType="server" 2. "uploadfile" style="file" size="uploadfile" runat= 3. "lbtnUpload" runat= 4. "JavaScript" Just a simple ID verification As long as the configured javascript:lbtnUpload...