Unauthenticated Stored XSS in FME Server versions 2019.2 and 2020.0 Beta allows a remote attacker to gain admin privileges by injecting arbitrary web script or HTML via the login page. The XSS is executed when an administrator accesses the logs.
https://community.safe.com/s/article/fme-server-2019-security-update
https://community.safe.com/s/article/FME-Server-Stored-Cross-Site-Scripting-XSS-Vulnerabilities