void ResourceFetcher::printAccessDeniedMessage(const KURL& url) const
{
    if (url.isNull())
        return;

    if (!frame())
        return;

    String message;
    if (!m_document || m_document->url().isNull())
        message = "Unsafe attempt to load URL " + url.elidedString() + '.';
    else
        message = "Unsafe attempt to load URL " + url.elidedString() + " from frame with URL " + m_document->url().elidedString() + ". Domains, protocols and ports must match.\n";

    frame()->document()->addConsoleMessage(SecurityMessageSource, ErrorMessageLevel, message);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.