Deep dive in Hyperlink Injection Protection Bypass
The bug involved hyperlink injection where the domain validation logic was bypassed using a double period trick, origannly disovered by Parth Narula. The application checked if the trusted domain was present in the URL string, but failed to properly parse the actual hostname. As a result, the injected link looked safe but actually directed to the attacker’s domain. This could lead to phishing or malicious redirection.