Exposure of Sensitive Information to an Unauthorized Actor
An issue exists in Vanilla Forums before 126.96.36.199 due to the way cookies are handled.
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.