Fix My WordPress Site & Enhance Security

My WordPress site is currently experiencing broken links and pages, along with significant security vulnerabilities, including a malware infection. I've taken the initial step of installing a security plugin, but the issues persist.

Key Issues:
- Broken links or pages
- Security vulnerabilities, specifically a malware infection

Ideal Skills:
- Extensive experience in WordPress site management and troubleshooting
- Proficient in cybersecurity, particularly in dealing with malware infections
- Familiarity with various WordPress security plugins