Klaus over on Blackhatdomainer described on his blog the use of XSS in whois information to take over domains when people are researching your domain. Very cool stuff. I have a feeling there are also servers that may be vulnerable to SQL injection as well, but that’s probably much more difficult and dangerous to test. Dotster was apparently vulnerable to this, but we didn’t have a working PoC.
However, Thrill then posted an screenshot of this on one of the several domain registrars that we found to be vulnerable to this. So now we proof that this can be done. Of course the usefulness of this is probably limited to only a few sites, but sites which often take credit card information for payment processing of domains. Which, obviously, has some usefulness for phishing. Anyway, pretty interesting stuff!