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Mikhail Deynekin edited this page Jan 23, 2026 · 6 revisions

Contact Form 7 Spam Checker (CF7FC)

1st CF7 Form Checker is an enterprise-grade security plugin designed specifically for WordPress Contact Form 7. Built with a defense-in-depth approach, the plugin implements multiple layers of security validation that work synergistically to protect form submissions while maintaining an optimal user experience for legitimate visitors.

🚀 Key Features Summary

Feature Category Capabilities
Language Validation 20+ language regex patterns (Cyrillic, CJK, Arabic, etc.)
Attack Detection SQL Injection, XSS, CSRF pattern matching
Rate Limiting 20 requests/minute, configurable thresholds and automatic IP banning
Bot Detection User-agent analysis, behavioral patterns
IP Management Ban/whitelist, temporary/permanent bans
File Upload Security MIME type validation, size limits (10MB)
Logging System JSON-based incident logging, 30-day retention

🛠 Technology Stack

  • PHP 7.4-8.2: Object-oriented architecture with strict typing.
  • WordPress Hooks API: Native integration with WP ecosystem.
  • Contact Form 7 API: Custom validation filters.
  • Tailwind CSS: Responsive admin interface.

📖 Documentation Sections

Author: Mikhail Deynekin

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