phpMyAdmin 2.11.x before 2.11.11.2, and 3.3.x before 3.3.9.1, does not properly handle the absence of the (1) README, (2) ChangeLog, and (3) LICENSE files, which allows remote attackers to obtain the installation path via a direct request for a nonexistent file.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.