The WPS Telegram Chat plugin for WordPress is vulnerable to unauthorized modification of data and loss of data due to a missing capability check on the 'Wps_Telegram_Chat_Admin::checkСonnection' function in versions up to, and including, 4.5.4. This makes it possible for authenticated attackers, with subscriber-level access and above, to have full access to the Telegram Bot API endpoint and communicate with it.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.