juzaweb CMS Theme Editor Page default access control

A vulnerability was found in juzaweb CMS up to 3.4.2. It has been classified as critical. Affected is an unknown function of the file /admin-cp/theme/editor/default of the component Theme Editor Page. The manipulation leads to improper access controls. It is possible to launch the attack 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.