Exposure of Sensitive Information to an Unauthorized Actor
The Direct Mail (direct_mail) extension before 3.1.2 for TYPO3 allows remote attackers to obtain sensitive information by leveraging improper checking of authentication codes.
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.