juzaweb CMS Add New Themes Page install improper authorization

A vulnerability classified as critical was found in juzaweb CMS 3.4.2. Affected by this vulnerability is an unknown functionality of the file /admin-cp/theme/install of the component Add New Themes Page. The manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.