The WordPress Comments Import & Export plugin for WordPress is vulnerable to to arbitrary file read due to insufficient file path validation during the comments import process, in versions up to, and including, 2.3.7. This makes it possible for authenticated attackers, with Author-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The issue was partially fixed in version 2.3.8 and fully fixed in 2.3.9
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.