Kliqqi-CMS has a background arbitrary code execution vulnerability that attackers can exploit to implant backdoors or getShell via the edit_page.php component.
SQL Injection vulnerability in Kliqqi-CMS 2.0.2 in admin/admin_update_module_widgets.php in recordIDValue parameter, allows attackers to gain escalated privileges and execute arbitrary code.
Kliqqi 3.0.0.5 allows CSRF with resultant Arbitrary File Upload because module.php?module=upload can be used to configure the uploading of .php files, and then modules/upload/upload_main.php can be used for the upload itself.
Kliqqi CMS 3.5.2 has XSS via a crafted group name in pligg/groups.php, a crafted Homepage string in a profile, or a crafted string in Tags or Description within pligg/submit.php.