Exposure of Sensitive Information to an Unauthorized Actor
Microsoft Office 2013 Gold, SP1, RT, and RT SP1 allows remote attackers to obtain sensitive token information via a web site that sends a crafted response during opening of an Office document, aka "Token Reuse Vulnerability."
CWE-200 - Information Exposure
An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.