The cookie-based XSS on the Terrahost main domain leads to the account takeover. The researcher was testing the terrahost.no main domain. There was a functionality where he could choose the service, then register an account and place an order. After looking into the requests in Burp, he found
customer_id
customer_name
customer_zipcode
customer_address
customer_city
With the above parameter, he found a Self XSS, and later he managed to escalate the issue to account takeover.
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