Sarah Palin's Yahoo Mail Account Hacked: How? - InformationWeek

Adam O'Donnell, director of emerging technologies at Cloudmark, said that the hackers might have compromised Palin's account in a variety of ways. He said they could have reset her password if they could answer the challenge questions. Or, he said, they could have used brute force password cracking software or a Web-based password cracking service. He also suggested that Palin's laptop or desktop computer could have been compromised or that she could have fallen victim to a sophisticated Web attack that relied on cookie theft or cross-site scripting.