Exposure of Sensitive Information to an Unauthorized Actor
REST client for Ruby (aka rest-client) before 1.7.3 logs usernames and passwords, which allows local users to obtain sensitive information by reading the log.
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.