freeXpathObject(xmlXPathObjectPtr xpathObj)
{
    int lpc, max = numXpathResults(xpathObj);

    if(xpathObj == NULL) {
        return;
    }

    for(lpc = 0; lpc < max; lpc++) {
        if (xpathObj->nodesetval->nodeTab[lpc] && xpathObj->nodesetval->nodeTab[lpc]->type != XML_NAMESPACE_DECL) {
            xpathObj->nodesetval->nodeTab[lpc] = NULL;
        }
    }

    /* _Now_ its safe to free it */
    xmlXPathFreeObject(xpathObj);
}

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