nuclei (template scanning)

nuclei -u <url> -t cves/ -severity critical,high

YAML template-based vulnerability scanner with thousands of templates for CVEs, misconfigurations, etc.

When you need a quick scan for known vulnerabilities (CVEs) in a web application. nuclei is very fast and efficient, and is constantly updated with new templates. Ideal for initial pentesting and identifying critical issues.

If the site is very large and the scan could cause overload. Also if you need deeper analysis, prefer tools like Nessus.