The WP Editor plugin for WordPress is vulnerable to arbitrary file read in all versions up to, and including, 1.2.9.1. This makes it possible for authenticated attackers, with Administrator-level access and above, to read arbitrary files on the affected site's server which may reveal sensitive information.
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.