This research measured vulnerability assessment tools’ performance on a university web application, including Burp Suite and OWASP ZAP. There are three measurement criteria: (1) the number of vulnerabilities classified under risk and confidence metrics, (2) the number of vulnerability types and URL alerts classified under risk and confidence metrics, and (3) the number of vulnerabilities classified in the 2021 OWASP Top 10 vulnerabilities. Results showed that Burp Suite detected more vulnerabilities and alerts than OWASP ZAP, with a higher proportion of high-risk vulnerabilities. However, OWASP ZAP had a higher proportion of medium-confidence vulnerabilities. The comparison also revealed that the vulnerabilities identified by both tools were ranked differently within the OWASP Top 10, and there were variations in risk prioritisation between the tools. Despite these differences, the vulnerability assessment results obtained from these tools are still helpful for the university’s security analysts and administration, as mitigating cyber threats to the web application is paramount.

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