Absolute path traversal vulnerability in program/steps/addressbook/photo.inc in Roundcube before 1.0.6 and 1.1.x before 1.1.2 allows remote authenticated users to read arbitrary files via a full pathname in the _alt parameter, related to contact photo handling.
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.