The NEX-Forms – Ultimate Forms Plugin for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'realval' parameter in all versions up to, and including, 9.2.2 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. The submission endpoint is registered via wpajaxnoprivsubmitnexform with no nonce verification, making it fully accessible to unauthenticated attackers without any CSRF token.

The NEX-Forms WordPress plugin before 9.2.3 does not sanitise and escape some submitted form data before storing it and outputting it back in the admin dashboard, leading to a Stored Cross-Site Scripting vulnerability which could allow unauthenticated users to perform Stored Cross-Site Scripting attacks against high privilege users such as administrators when they view the submitted entries.