MaxButtons <= 9.2 is vulnerable to Authenticated Stored Cross-Site Scripting (XSS) vulnerability

The MaxButtons plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 9.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.