Documentation

Master Quant's powerful CVSS scoring capabilities. Learn how to accurately assess vulnerability severity across all CVSS versions with our comprehensive guide.

Getting Started

Start scoring vulnerabilities in minutes with Quant's intuitive interface.

How to Use Quant
  1. 1

    Select a CVSS Version

    Choose from v4.0 (latest), v3.1, v3.0, or v2.0 using the tabs at the top of the calculator.

  2. 2

    Configure Metrics

    Select values for each metric group: Base (required), Temporal/Threat, Environmental, and Supplemental (v4.0 only).

  3. 3

    Watch Real-Time Updates

    See your CVSS score update instantly as you select values, displayed prominently in the score card.

  4. 4

    Export & Share

    Copy the vector string, generate a shareable link, get embeddable HTML code, or save to the Score Manager.

CVSS Versions

Understand the differences between CVSS versions and when to use each one.

Advanced Features

Discover what makes Quant the most powerful nextgen CVSS calculator.

Real-Time Scoring

Watch your CVSS score update instantly as you adjust metrics. The score card displays current severity, rating, and vector string in real-time.

Multi-Format Export & Sharing
  • Copy Vector: CVSS vector string for documentation
  • Share Link: Pre-configured assessment URL
  • Embeddable Code: HTML snippet to embed score cards on websites
  • Save to Manager: Store assessments in the Score Manager for later and more advanced use
Score Management & Analytics

Save calculated scores to your browser. Sort, filter, compare, edit, delete, and restore previous assessments with ease.

  • Side-by-Side Comparison: Compare multiple scores to identify differences
  • Interactive Charts: Generate severity distribution and analytics charts
  • Chart Export: Export charts as PNG images
  • Import/Export History: Backup and restore your score collection
Visual Analytics & Embedding

Generate interactive charts showing severity distribution, metric impact analysis, and comparative scoring across versions.

  • Chart Export: Download charts as PNG images
  • Embeddable Charts: Generate HTML code to embed charts on websites
  • Interactive Controls: Customize chart appearance and settings
  • Multiple Chart Types: Bar charts and donut charts available
URL Vector Loading

Share assessments via URL with pre-configured metrics. Anyone can open the link to view your exact assessment or continue editing.

/?vector=CVSS:4.0/AV:N/AC:L/...
Offline Capability

Works completely offline with no internet required. All calculations happen in your browser, no data is ever sent to our servers.

Dark & Light Modes

Seamless theme switching for comfortable use in any environment. Respects system preferences and remembers your choice.

Import/Export History

Export your complete assessment history as JSON and import it on other devices or browsers. Backup and restore your work easily.

Responsive Design

Perfect experience on desktop, tablet, and mobile devices. Optimized UI for all screen sizes with touch-friendly controls.

Detailed Metrics

In-context help explaining each metric, its implications, and scoring guidance. Understand the impact of every selection.

Privacy First

Client-side only processing. No account required. Zero data collection. Your vulnerability assessments remain completely private.

Severity Ratings

How CVSS scores map to severity levels.

CVSS v4.0, v3.1, v3.0
Five-level severity scale

None

No vulnerability

0.0

Low

Minimal impact

0.1 - 3.9

Medium

Moderate risk

4.0 - 6.9

High

Significant risk

7.0 - 8.9

Critical

Urgent action required

9.0 - 10.0
CVSS v2.0
Legacy three-level scale

Low

Minor vulnerability

0.0 - 3.9

Medium

Moderate impact

4.0 - 6.9

High

Severe vulnerability

7.0 - 10.0

Frequently Asked Questions

Quick answers to common questions about Quant and CVSS.

Official Resources

Learn more about CVSS from the official FIRST.org sources.