FeehiCMS BannerForm[img] unrestricted upload

A vulnerability has been found in FeehiCMS up to 2.1.1 and classified as critical. This vulnerability affects the function createBanner of the file /admin/index.php?r=banner%2Fbanner-create. The manipulation of the argument BannerForm[img] leads to unrestricted upload. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.