BM Content Builder <= 3.16.2.1 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting via ux_cb_page_options_save

The BM Content Builder plugin for WordPress is vulnerable to unauthorized modification of data to a missing capability check on the 'ux_cb_page_options_save' function in all versions up to, and including, 3.16.2.1. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.