Common Vulnerability Scoring System (SVSS) version 3.0 framework was the last one that was published by the organization responsible for creating it. It was created by the Forum of Incident Response and Security Teams (FIRST). 

Vulnerability is a weakness in software, hardware, procedures or personnel. But, not all vulnerabilities are the same. Some vulnerability has system administrators scrambling to deploy a patch, while some are not worth fixing. 

Written by Roi Cohen and Tomer Zayit, translated by Benjamin Baker