According to security vendor finjan software, a bug in google could have allowed attackers to grab a google user’s

The correct answer for the given question is "cookie".

Explanation:

In the security of vendor Finjan Software, a bugs or error in the google could allowed the attackers the grab the information of  google users account i.e cookie.The cookie gives all the information of google account OF that user  because it is stored in the client side machine that  means it stored in the web browser .all the information of particular user are stored in the browser with the help of cookie attackers easily grab the information by using cookie and harm the user.