Exposure of Sensitive Information to an Unauthorized Actor
A user privacy issue was addressed by removing the broadcast MAC address. This issue is fixed in iOS 12.2. A device may be passively tracked by its WiFi MAC address.
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.