    private ModelAndView renameGroup(HttpServletRequest request, HttpServletResponse response) throws Exception {
        
        String oldName = request.getParameter("groupName");
        String newName = request.getParameter("newName");
        
        if (StringUtils.hasText(oldName) && StringUtils.hasText(newName)) {
            m_groupRepository.renameGroup(oldName, newName);
        }
        
        return listGroups(request, response);
    }
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.