Formwork is a flat file-based Content Management System (CMS). An attackers (requires administrator privilege) to execute arbitrary web scripts by modifying site options via /panel/options/site. This type of attack is suitable for persistence, affecting visitors across all pages (except the dashboard). This vulnerability is fixed in 1.13.1.
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.