CVSS (Common Vulnerability Scoring System) rates the inherent severity of a vulnerability independent of context. A CVSS 9.8 finding sounds alarming — but if it is on a test server that does not handle customer data, the actual business risk may be low. A CVSS 5.0 finding on a customer-facing authentication endpoint that handles payment data may be far more dangerous in practice.
CVSS scores were designed for security analysts who can layer context on top of the number. A CTO or founder reading a list of CVSS scores without that expertise cannot make reliable prioritisation decisions.
The BIS is calculated by weighting four factors:
When a finding is part of an attack path, the BIS is also adjusted upward to reflect the amplified risk of the chain as a whole.
The scan-level BIS (the overall score for your entire scan) is designed for board and executive communication. A single number from 0 to 10 — with clear language about what it means — is easier to communicate than a list of CVSS scores.
Each PDF report includes the BIS prominently in the executive summary. Delta reports show the BIS trend over time: whether your security posture is improving (BIS decreasing) or degrading (BIS increasing). This gives boards and investors a clear, auditable record of security improvement.
See: What is a Business Impact Score? · What is a CVSS Score? · PDF Reports feature
The free plan includes a Business Impact Score preview — the overall scan BIS is visible. Individual per-finding BIS scores for Critical and High findings are locked until you upgrade. Medium and Low findings include their BIS on the free plan. See all plans.
If you believe a BIS is inaccurate for your specific environment — for example, if the affected asset is a decommissioned test server — contact support@veilscan.net with your scan ID and the finding in question. The BIS is a risk indicator, not a compliance assertion, and context you provide may lead to a revised assessment.
Each scheduled rescan calculates a fresh BIS for the full domain. Delta reports show the BIS change since the last scan. A decreasing BIS across scans demonstrates measurable security improvement — useful for compliance evidence and board reporting.