Watu Quiz <= 3.4.1.1 - Authenticated (Author+) Stored Cross-Site Scripting

The Watu Quiz plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Quiz values in all versions up to, and including, 3.4.1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, this can not be exploited by authors - access needs to be explicitly granted.