DocumentLoader* Document::loader() const
{
    if (!m_frame)
        return 0;

    DocumentLoader* loader = m_frame->loader().documentLoader();
    if (!loader)
        return 0;

    if (m_frame->document() != this)
        return 0;

    return loader;
}

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