Update the WordPress MultiSafepay plugin for WooCommerce plugin to the latest available version (at least 4.16.0).
Brandon Roldan discovered and reported this Directory Traversal vulnerability in WordPress MultiSafepay plugin for WooCommerce Plugin. This could allow a malicious actor to see all files in a given directory or determine if certain files/directories exist in given folder. This can be used to exploit other weaknesses in the system This vulnerability has been fixed in version 4.16.0.