Monstra CMS 3.0.4 has Stored XSS via the Name field on the Create New Page screen under the admin/index.php?id=pages URI, related to plugins/box/pages/pages.admin.php.

Monstra CMS 3.0.4 has a stored XSS vulnerability when an attacker has access to the editor role, and enters the payload in the content section of a new page in the blog catalog.

Monstra CMS 3.0.4 allows users to upload arbitrary files, which leads to remote command execution on the server, for example because .php (lowercase) is blocked but .PHP (uppercase) is not.