Subrion CMS 4.2.1 is affected by: Cross Site Scripting (XSS) through the avatar[path] parameter in a POST request to the /_core/profile/ URI.

Subrion CMS 4.2.1 has CSRF in panel/modules/plugins/. The attacker can remotely activate/deactivate the plugins.

Subrion CMS v4.2.1 allows XSS via the panel/phrases/ VALUE parameter.

An XSS issue was identified on the Subrion CMS 4.2.1 /panel/configuration/general settings page. A remote attacker can inject arbitrary JavaScript code in the v[language_switch] parameter (within multipart/form-data), which is reflected back within a user's browser without proper output encoding.

A Cross-Site Request Forgery (CSRF) vulnerability was discovered in Subrion CMS 4.2.1 that allows a remote attacker to remove files on the server without a victim's knowledge, by enticing an authenticated user to visit an attacker's web page. The application fails to validate the CSRF token for a GET request. An attacker can craft a panel/uploads/read.json?cmd=rm URL (removing this token) and send it to the victim.

admin/blocks.php in Subrion CMS through 4.2.1 allows PHP Object Injection (with resultant file deletion) via serialized data in the subpages value within a block to blocks/edit.

Subrion CMS 4.2.1 allows CSV injection via a phrase value within a language. This is related to phrases/add/ and languages/download/.

Subrion CMS 4.2.1 allows session fixation via an alphanumeric value in a session cookie.

Subrion CMS 4.1.5 (and possibly earlier versions) allow CSRF to change the administrator password via the panel/members/edit/1 URI.

Subrion 4.2.1 allows XSS via the panel/members/ Username, Full Name, or Email field, aka an "Admin Member JSON Update" issue.