ClipperCMS 1.3.3 does not have CSRF protection on its kcfinder file upload (enabled by default). This can be used by an attacker to perform actions for an admin (or any user with the file upload capability). With this vulnerability, one can automatically upload files (by default, it allows html, pdf, xml, zip, and many other file types). A file can be accessed publicly under the "/assets/files" directory.
Stored cross-site scripting (XSS) vulnerability in the "Site Name" field found in the "site" tab under configurations in ClipperCMS 1.3.3 allows remote attackers to inject arbitrary web script or HTML via a crafted site name to the manager/processors/save_settings.processor.php file.