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1C-Bitrix through 25.100.500 allows Remote Code Execution because an actor with SOURCE/WRITE permissions for the Translate Module can upload and execute code by sending a PHP file and a .htaccess file. NOTE: this is disputed by the Supplier because this is intended behavior for the high-privileged users who can upload new translated pages to the website.
Insufficiently protected credentials in SMTP server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote administrators to read SMTP accounts passwords via HTTP GET request.
Insufficiently protected credentials in DAV server settings in 1C-Bitrix Bitrix24 23.300.100 allows remote administrators to read Exchange account passwords via HTTP GET request.