The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via settings set through a REST route in versions up to, and including, 4.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This was partially patched in 4.1 and fully patched with sanitization in 4.2.
