Description

The application does not escape special characters before output to FE, lead to stored XSS.

Proof of Concept

Example of a case:

1. Go to Content > Content Types /Admin/ContentTypes/List

2. Create or edit a type with XSS payload into Display Name field, e.g: Social Meta Settings </title><svg/onload=alert('hacked')><title>

Tick on the Creatable checkbox

3. Save and go to create new Type which edited above or go to Content > Content Items. Script will triggered

Impact

XSS can have huge implications for a web application and its users. User accounts can be hijacked, change the html screen and insult the organization. Credentials could be stolen, sensitive data could be exfiltrated, and lastly, access to your client computers can be obtained.