Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-FEB8AFDC-B3E5-11EA-9DF5-08002728F74C:
Ruby on Rails blog:
Rails 6.0.3.2 has been released! This version of Rails contains an
important security patch, and you should upgrade! The release contains
only one patch that addresses CVE-2020-8185.
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center