By default, the WP Page Builder WordPress plugin before 1.2.4 allows subscriber-level users to edit and make changes to any and all posts pages - user roles must be specifically blocked from editing posts and pages.
https://www.themeum.com/wp-page-builder-updated-v1-2-4/
https://wpscan.com/vulnerability/21e7a46f-e9a3-4b20-b44a-a5b6ce7b7ce6