Eura7 CMSmanager in version 4.6 and below is vulnerable to Reflected XSS attacks through manipulation of return GET request parameter sent to a specific endpoint. The vulnerability has been fixed by a patche patch 17012022 addressing all affected versions in use.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.