SQL Injection Risk Calculator

Rate SQL injection exposure from query construction, validation, database privileges and the data reachable behind the query.

About SQL Injection Risk Calculator

Every factor uses the OWASP 0–9 ordinal scale, so a fully parameterised query scores 1 and raw concatenation scores 9. Likelihood averages the five factors that decide whether an attacker finds and lands the injection; impact averages what the compromised database account can reach, uplifted when the blast radius runs to millions of records. SQL injection is still the fastest route from an anonymous HTTP request to your entire customer table, and the difference between Medium and Critical is usually the privilege level of one database account.

Formula

SQL Injection Risk

Likelihood = mean(query construction, validation, exposure, WAF posture, detection); impact = mean(database privilege, data sensitivity) plus a record-volume uplift, both on the OWASP 0–9 scale.

likelihood: 0–9 OWASP likelihood
impact: 0–9 OWASP impact
recordBoost: 0–2 uplift for the number of reachable records

Worked example

With the default values below, SQL Injection Risk Calculator returns Overall Risk Severity of Critical. Change any input above and every figure here is recalculated in your browser.

Inputs used

Query constructionone of Parameterised or prepared statements only — 1, ORM with occasional raw SQL — 3, Manual escaping helper — 7, String concatenation of user input — 9: String concatenation of user input — 9
Input validation on the parameterone of Strict allow-list per field — 1, Type and length checks — 3, Deny-list filtering — 6, None — 9: Deny-list filtering — 6
Endpoint exposureone of Internal admin only — 2, Authenticated users — 6, Anonymous internet — 9: Anonymous internet — 9
WAF or RASP in front of the endpointone of Tuned WAF in blocking mode — 1, WAF in detection only — 5, None — 9: WAF in detection only — 5
Query anomaly logging and reviewone of Active detection and alerting — 1, Logged and reviewed — 3, Logged without review — 8, Not logged — 9: Logged without review — 8
Database account privilegesone of Read-only on a single schema — 3, Read and write on the app schema — 6, DDL rights on the app database — 7, DBA or superuser — 9: DDL rights on the app database — 7
Sensitivity of the reachable tablesone of Public reference data — 2, Internal business data — 5, Regulated PII or payment data — 7, Credentials or the full customer database — 9: Regulated PII or payment data — 7
Records reachable from this query pathaccepts 0–1,000,000,000 records: 250,000 records

Results

Overall Risk Severity: Critical
Likelihood Score: 7.40 / 9
Impact Score: 8.00 / 9
Risk Score: 6.58 / 9
Suggested Remediation Window: 7 days
Highest-Value Fix: Convert the query to parameterised or prepared statements

Step by step

1Values used
2SQL Injection Risk
3Overall Risk Severity= Critical
4Likelihood Score= 7.40 / 9
5Impact Score= 8.00 / 9
6Risk Score= 6.58 / 9
7Suggested Remediation Window= 7 days
8Highest-Value Fix= Convert the query to parameterised or prepared statements

Assumptions and limits

The result is derived only from the 8 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is SQL Injection Risk calculated?

Likelihood = mean(query construction, validation, exposure, WAF posture, detection); impact = mean(database privilege, data sensitivity) plus a record-volume uplift, both on the OWASP 0–9 scale. Every factor uses the OWASP 0–9 ordinal scale, so a fully parameterised query scores 1 and raw concatenation scores 9. Likelihood averages the five factors that decide whether an attacker finds and lands the injection; impact averages what the compromised database account can reach, uplifted when the blast radius runs to millions of records.

Why does SQL Injection Risk matter?

SQL injection is still the fastest route from an anonymous HTTP request to your entire customer table, and the difference between Medium and Critical is usually the privilege level of one database account.

What values do I need to enter?

This calculator takes 8 inputs: Query construction, Input validation on the parameter, Endpoint exposure, WAF or RASP in front of the endpoint, Query anomaly logging and review, Database account privileges, Sensitivity of the reachable tables, Records reachable from this query path. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

Does a WAF make SQL injection a low risk?

No. A WAF lowers likelihood by a factor or two but never to 1, because signature evasion is routine and second-order injection never crosses the WAF at all. Parameterised queries remove the vulnerability class; a WAF only buys time to deploy them.