Exposure of Sensitive Information to an Unauthorized Actor
Mambo Site Server 4.0.11 allows remote attackers to obtain the physical path of the server via an HTTP request to index.php with a parameter that does not exist, which causes the path to be leaked in an error message.
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.