The author discovered an HTML injection vulnerability in the email registration process for a NASA workshop. By injecting HTML tags into the first and last name fields, the author was able to successfully execute the HTML code in the email received.
The author then attempted to escalate the severity of the issue by exploring the possibility of chaining the HTML injection with a lack of DMARC policy. DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a protocol that helps prevent email spoofing.
The author used the MXToolbox website to check the DMARC policy for the NASA domain and found that it was not enabled. This allowed the author to potentially spoof emails from the NASA domain using the emkei.cz website.
By combining the HTML injection and the lack of DMARC policy, the author could send spoofed emails from the NASA domain with malicious content, potentially leading to user redirection, IP address disclosure, and account takeover.
The author suggests that properly reporting this issue, including a video demonstration of the attack chain and referencing relevant resources, can increase the chances of the bug being triaged and the severity being escalated.
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