SolarWinds SFTP/SCP server through 2018-09-10 is vulnerable to XXE via a world readable and writable configuration file that allows an attacker to exfiltrate data.

In SolarWinds SFTP/SCP Server through 2018-09-10, the configuration file is world readable and writable, and stores user passwords in an insecure manner, allowing an attacker to determine passwords for potentially privileged accounts. This also grants the attacker an ability to backdoor the server.