The affected product lacks proper validation of user-supplied data, which can result in deserialization of untrusted data on the Ignition 8 Gateway (versions prior to 8.0.10) and Ignition 7 Gateway (versions prior to 7.9.14), allowing an attacker to obtain sensitive information.
https://www.us-cert.gov/ics/advisories/icsa-20-147-01
http://packetstormsecurity.com/files/158226/Inductive-Automation-Ignition-Remote-Code-Execution.html