The attacker does not need to be logged in to Joomla to exploit this vulnerability: SQL in code via id parameter: ./administrator/components/com_gallery/models/gallery.php 51 public function getPropertie() { 52 $db = JFactory::getDBO(); 53 $id_cat = JRequest::getVar('id'); 54 $query = $db->getQuery(true); 55 $query->select('#__huge_itgallery_images.name as name,' 56 . '#__huge_itgallery_images.id ,' 57 . '#__huge_itgallery_gallerys.name as portName,' 58 . 'gallery_id, #__huge_itgallery_images.description as description,image_url,sl_url,sl_type,link_target,#__huge_itg allery_images.ordering,#__huge_itgallery_images.published,published_in_sl_width'); 59 $query->from(array('#__huge_itgallery_gallerys' => '#__huge_itgallery_gallerys', '#__huge_itgallery_images' => '#__huge_itg allery_images')); 60 $query->where('#__huge_itgallery_gallerys.id = gallery_id')->where('gallery_id=' . $id_cat); 61 $query->order('ordering desc'); 62 64 $db->setQuery($query); 65 $results = $db->loadObjectList(); 66 return $results; 67 } XSS is here: root@Joomla:/var/www/html# find . -name "*.php" -exec grep -l "echo \$_GET" {} \; ./administrator/components/com_gallery/views/gallery/tmpl/default.php root@Joomla:/var/www/html# find . -name "*.php" -exec grep -n "echo \$_GET" {} \; 256: <a class="modal" rel="{handler: 'iframe', size: {x: 800, y: 500}}" href="index.php?option=com_gallery&view=video&tmpl=component&pid=<?php echo $_GET['id']; ?>" title="Image" >