What is the OWASP risk rating methodology?

The OWASP Risk Rating Methodology is a framework for estimating cybersecurity risk by evaluating two key dimensions: the likelihood of a threat being exploited and the business impact if it occurs. It considers factors like skill level required, motive, opportunity, vulnerability prevalence, and impact on confidentiality, integrity, availability, and business operations.

How is cybersecurity risk calculated?

Cybersecurity risk is calculated using the formula: Risk = Likelihood × Impact. Our calculator evaluates threat agent factors (skill level, motive, opportunity, size), vulnerability factors (ease of discovery, exploit, awareness, detection), and impact factors (confidentiality, integrity, availability, financial damage, reputation, compliance) to produce a composite risk score from 0 to 9.

Is this risk assessment calculator free to use?

Yes, the MicroHackers OWASP Risk Assessment Calculator is completely free. No registration, no email required, and no hidden costs. You can use it as many times as needed to evaluate different cybersecurity threats and vulnerabilities.

What factors affect threat likelihood in a risk assessment?

Threat likelihood is determined by two groups of factors: Threat Agent Factors (attacker skill level, motivation, opportunity, and group size) and Vulnerability Factors (ease of discovery, ease of exploit, awareness of the vulnerability, and intrusion detection capabilities). Each factor is scored from 0 to 9.

Who should use a cybersecurity risk assessment calculator?

This tool is designed for IT managers, CISOs, security analysts, compliance officers, and small business owners who need to quantify cyber risks quickly. It is also useful for consultants preparing risk reports and teams prioritizing security investments based on actual risk levels rather than assumptions.

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Free OWASP Risk Assessment Calculator

Evaluate technical cyber risks with precision. Analyze threats, vulnerabilities, and impact in real time to support audits, compliance, and mitigation strategies.

How to Use This Calculator

Follow these steps to evaluate cyber risk using the OWASP methodology:

Define the threat scenario — Describe the specific threat or attack vector you want to evaluate, such as SQL injection, insider threat, or phishing attack.
Rate the Likelihood factors — Score each threat agent factor (skill level, motive, opportunity, size) and vulnerability factor (ease of discovery, ease of exploit, awareness, intrusion detection) from 0 to 9.
Rate the Impact factors — Evaluate both technical impact (loss of confidentiality, integrity, availability, accountability) and business impact (financial damage, reputation damage, non-compliance, privacy violation) from 0 to 9.
Get your risk rating — Click “Calculate Risk” to receive an instant OWASP risk severity rating (Low, Medium, High, or Critical) based on the combined likelihood and impact scores.
Export your results — Download the risk assessment as an Excel report to document findings, share with stakeholders, or include in your compliance documentation.

Use our OWASP Risk Assessment Calculator to perform in-depth cybersecurity evaluations based on threat agents, system vulnerabilities, and business impact. This tool enables security teams to quantify risks aligned with international frameworks like ISO 27005, NIST SP 800-30, and OWASP Top 10.

Ideal for internal security reviews, penetration testing documentation, and technical compliance audits.

Free Interactive Assessment

Quantify technical and business cyber risk in minutes

Complete the factors below to generate a shareable risk profile, business-ready summary and an emailed copy of your result.

Threat Agents

Measure attacker capability, motivation, access and audience size.

Skill Level