Incomplete blacklist vulnerability in main.php in phPay 2.02.01 on Windows allows remote attackers to conduct directory traversal attacks and include and execute arbitrary local files via a ..\ (dot dot backslash) in the config parameter.
Improper Limitation of a Pathname to a Restricted Directory The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.