demo.gravitypdf.com XSS vulnerability

Vulnerable URL: https://demo.gravitypdf.com/wp/wp-admin/admin.php?page=gfeditforms=settings=pdf=13'"0& Details: Description| Value ---|--- Patched:| No Latest check for patch:| 28.12.2017 Vulnerability type:| XSS Vulnerability status:| Publicly disclosed Alexa Rank| Unknown / Not calculated VIP...