Users who access Google’s Gmail or the Facebook social-networking site over Wi-Fi could put their accounts at risk of being hijacked, according to research from Errata Security, a computer security company.

It’s not just those sites but any rich Web applications that exchange account information with users, including blogging sites such as Blogspot or even software-as-a-service offerings such as Salesforce.com, that could pose a risk for users, wrote Errata’s Robert Graham, CEO, and David Maynor, chief technology officer, in a paper.