The School Management System for Wordpress plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the mj_smgt_load_documets_new() and mj_smgt_load_documets() functions in all versions up to, and including, 91.5.0. This makes it possible for authenticated attackers, with Student-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.