The 'Upload logo from external path' function of SolarWinds Network Performance Monitor version 12.0.15300.90 allows remote attackers to ca…

The 'Upload logo from external path' function of SolarWinds Network Performance Monitor version 12.0.15300.90 allows remote attackers to cause a denial of service (permanent display of a "Cannot exit above the top directory" error message throughout the entire web application) via a ".." in the path field. In other words, the denial of service is caused by an incorrect implementation of a directory-traversal protection mechanism.