Department of Homeland Security named FIRST the custodian of the Common Vulnerability Scoring System (CVSS) CVSS is a way to quantify the severity of a vulnerability using three groups: a base metric group, a temporal group, and an environmental group. The definitive documents on CVSS are available on the FIRST CVSS site. I think this system will have some legs, so keep an eye on it. I would expect them to exercise a little more intellectual rigor on the documents their group produces.”]
Source: https://taosecurity.blogspot.com/2005/05/common-vulnerability-scoring-system.html