A SCAP specification for communicating the characteristics of vulnerabilities and measuring their relative severity. Response:

The Common Vulnerability Scoring System (CVSS) is a widely used, open industry standard for assessing the severity of computer system security vulnerabilities and is a key component of the SCAP framework for communicating vulnerability characteristics.

A Continuity of Operations Plan (COOP) is a plan for maintaining essential functions during a disruption, not a vulnerability scoring system.

A Disaster Recovery Plan (DRP) outlines procedures for recovering IT infrastructure after a disaster, not for scoring vulnerabilities.

Common Vulnerabilities and Exposures (CVE) provides a dictionary of publicly known cybersecurity vulnerabilities, but it does not define a system for scoring their severity; that is CVSS's role.