VulnIQ collects exploits such as Metasploit modules, exploits published by exploit-db.com and correlates them with other data.
For example you can instantly see exploits for CVE-2020-3952 by clicking the "Data Referencing This Item" tab. Existence of a public exploit is used as a parameter to the calculation of VulnIQ score for vulnerabilities. A vulnerability with a public exploit is typically considered critical.
When running your private instance, you can add/remove data sources as you like.