CVSS v3.1 Base Severity Score Calculator
Computes Common Vulnerability Scoring System (CVSS) v3.1 base score and severity rating.
Notice: engineering verification utility. Use test or de-identified data and verify results independently before relying on them.
How it works
Standard: FIRST CVSS v3.1 Specification
Formula: Impact and Exploitability metric sub-score calculation mapping to Low, Medium, High, Critical
Checks: Valid numeric CVSS score between 0.0 and 10.0
Calculated locally in browser memory; nothing leaves your browser.
Deterministic local-first client-side execution. Provided as-is without warranty.