SilverStripe 2.3.x before 2.3.8 and 2.4.x before 2.4.1, when running on servers with certain configurations, allows remote attackers to obtain sensitive information via a direct request to PHP files in the (1) sapphire, (2) cms, or (3) mysite folders, which reveals the installation path in an error message.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.