Ninja Forms < 3.10.2.2 - Contributor+ Stored XSS via CSTI

Description

The plugin is vulnerable to Stored Cross-Site Scripting via the use of a templating engine due to insufficient output escaping on user data passed through the template. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.