The Easy Mega Menu Plugin for WordPress – ThemeHunk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘themehunk_megamenu_bg_image' parameter in all versions up to, and including, 1.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Please note that this was partially fixed in 1.1.0 due to the missing authorization protection that was added.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.