The File Manager Pro – Filester plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'ajax_install_plugin' function in all versions up to, and including, 1.8.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install the Filebird plugin.

The File Manager Pro – Filester plugin for WordPress is vulnerable to Local JavaScript File Inclusion in all versions up to, and including, 1.8.5 via the 'fm_locale' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included. The vulnerability was partially patched in version 1.8.5.

The File Manager Pro – Filester plugin for WordPress is vulnerable to arbitrary file uploads due to missing validation in the 'fsConnector' function in all versions up to, and including, 1.8.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, and granted permissions by an Administrator, to upload a new .htaccess file allowing them to subsequently upload arbitrary files on the affected site's server which may make remote code execution possible.

The File Manager Pro – Filester plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'njt_fs_saveSettingRestrictions' function in all versions up to, and including, 1.8.2. This makes it possible for authenticated attackers, with a role that has been granted permissions by an Administrator, to update the plugin settings for user role restrictions, including allowing file types such as .php to be uploaded.

The File Manager Pro WordPress plugin before 1.8.1 does not adequately validate and escape some inputs, leading to XSS by high-privilege users.

The File Manager Pro WordPress plugin before 1.8.1 allows admin users to upload arbitrary files, even in environments where such a user should not be able to gain full control of the server, such as a multisite installation. This leads to remote code execution.

The File Manager Pro WordPress plugin before 1.8 does not properly check the CSRF nonce in the `fs_connector` AJAX action. This allows attackers to make highly privileged users perform unwanted file system actions via CSRF attacks by using GET requests, such as uploading a web shell.