HexBrain

Gratipay · Report #128910

prevent %2f spoofed URLs in profile statement

Informativestatus
21 Aug 2017disclosed

How it was found

https://gratipay.com%[email protected] on clicking on this url this link will take to the google.com or any other malicious url. On seeing it will look like the link will take to the gratipay but onclicking the url it will redirect to the malicious site.Attacker with the help social engg. techniques will able to redirect the user to any Ransomware site for they nefarious purpose

POC:- Click on the link it will redirect to google.com

Fix:- The hostname must end in %2f, which gets URL-decoded to /. This ensures that the browser only sends the request to the intended host.

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original