If you’re running a WordPress site or managing cloud infrastructure, using an open source vulnerability scanner can be one of the smartest, most cost-effective steps to secure your environment.
In this guide, we’ll explore the best open source vulnerability scanning tools—including some that are ideal for WordPress—and explain how to use them to detect security flaws before attackers do.
Why Use an Open Source Vulnerability Scanner?
- ✅ It’s free (or significantly cheaper than enterprise solutions)
- ✅ Transparent codebase (auditable and modifiable)
- ✅ Active communities and frequent updates
- ✅ Ideal for DevOps, small teams, or security-conscious developers
Whether you’re scanning plugins, themes, or an entire network, these tools help identify weaknesses early.
Best Open Source Vulnerability Scanners for WordPress & Web Apps
1. WPScan
- Specifically built for WordPress
- Detects vulnerable plugins, themes, and outdated core versions
- CLI-based, maintained by Automattic
WPScan is the most focused open source web vulnerability scanner for WordPress.
2. OpenVAS
- Full-featured network vulnerability scanner
- Detects thousands of vulnerabilities
- Great for scanning servers where WordPress is hosted
3. Nikto
- Lightweight web server scanner
- Detects outdated server components, insecure files, and misconfigurations
4. Nmap + NSE Scripts
- Use scripts to run vulnerability detection scans across networks
- Helpful for identifying open ports and services hosting WordPress
Looking for a Free Website Vulnerability Scanner?
Check out PressVuln.com:
- Detects plugin and theme vulnerabilities
- Identifies WordPress version and CVEs
- No install or technical setup required
Combine PressVuln with a local open source security scanner for full-stack visibility.
How to Get Started
- Choose your scanner based on your goal (e.g., WPScan for plugin scans, OpenVAS for full networks)
- Run your first scan against a staging or test environment
- Review CVE reports and patch vulnerabilities immediately
- Schedule regular scans to maintain security
Final Thoughts
With cyberattacks rising, relying solely on your hosting provider is not enough. Open source tools give you powerful options to take control of your site’s security.
Try a free open source vulnerability scanner today—and use PressVuln.com to keep your WordPress site secure with minimal effort.