Directory traversal vulnerability in download.php in the Passive Capture Application (PCA) web console in IBM Tealeaf CX 7.x, 8.x through 8.6, 8.7 before FP2, and 8.8 before FP2 allows remote authenticated users to bypass intended access restrictions via a .. (dot dot) in the log parameter, as demonstrated using a crafted request for a customer-support file, as demonstrated by a log file.
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.