From wordfence.com
On March 16, 2020, LearnPress – WordPress LMS Plugin, a WordPress plugin with over 80,000 installations, patched a high-severity vulnerability that allowed subscriber-level users to elevate their permissions to those of an “LP Instructor”, a custom role with capabilities similar to the WordPress “author” role, including the ability to upload files and create posts containing unfiltered HTML, both of which could be used as part of an exploit chain allowing site takeover.