In Monstra CMS 3.0.4, an attacker with 'Editor' privileges can change the password of the administrator via an admin/index.php?id=users&action=edit&user_id=1, Insecure Direct Object Reference (IDOR).

Monstra CMS 3.0.4 does not properly restrict modified Snippet content, as demonstrated by the admin/index.php?id=snippets&action=edit_snippet&filename=google-analytics URI, which allows attackers to execute arbitrary PHP code by placing this code after a <?php substring.

Multiple cross-site scripting (XSS) vulnerabilities in Monstra CMS 3.0.4 allow remote attackers to inject arbitrary web script or HTML via the (1) first name or (2) last name field in the edit profile page.

plugins/box/users/users.plugin.php in Monstra CMS 3.0.4 allows Login Rate Limiting Bypass via manipulation of the login_attempts cookie.

Monstra CMS 3.0.4 has Reflected XSS during Login (i.e., the login parameter to admin/index.php).

Monstra CMS 3.0.4 has a Session Management Issue in the Users tab. A password change at users/1/edit does not invalidate a session that is open in a different browser.

Monstra CMS 3.0.4 has a Session Management Issue in the Administrations Tab. A password change at admin/index.php?id=users&action=edit&user_id=1 does not invalidate a session that is open in a different browser.

Monstra CMS 3.0.4 has XSS in the registration Form (i.e., the login parameter to users/registration).

plugins/box/pages/pages.admin.php in 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 title section of an admin/index.php?id=pages&action=edit_page&name=error404 (aka Edit 404 page) action.

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.