Pentaho Business Analytics Server versions before 9.2.0.2 and 8.3.0.25 using the Pentaho Analyzer plugin exposes a service endpoint for templates which allows a user-supplied path to access resources that are out of bounds. The software 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 software 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. By using special elements such as ".." and "/" separators, attackers can escape outside of the restricted location to access files or directories that are elsewhere on the system.

Pentaho Business Analytics
 Server versions before 9.2.0.2 and 8.3.0.25 using the Pentaho 
Analyzer plugin exposes a service endpoint for templates which allows a 
user-supplied path to access resources that are out of bounds. 

The software 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 software 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.  By using special elements such as 
".." and "/" separators, attackers can escape outside of the restricted 
location to access files or directories that are elsewhere on the 
system.