EventON < 2.2 - Admin+ Stored XSS

Proof of Concept

1. Create a new events.
2. In the "Event Details", select "Online Event" for the "Event Attendance Mode".
3. Under "Virtual Event", select "This is a virtual (online) event" and then click on "Configure Virtual Event Details"
4. On the modal that pops up, enter the payload `'"><img src=X onerror=alert(1)>` for the Meeting URL.
5. Scroll down and click on the toggle "Disable redirecting and hiding virtual event link".
6. Save the changes and then publish the event.
7. View the event and see the XSS.