# Security Audit Report - MyParcel Plugin v5.2.1
**Date:** January 14, 2026  
**Auditor:** Dyronics Development Team  
**Plugin:** WooCommerce MyParcel (Dyronics Custom)

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## Executive Summary

✅ **Status:** SECURE - Ready for production deployment  
✅ **Security Level:** Enhanced with multiple security layers  
✅ **Risk Level:** LOW  

The plugin has been thoroughly audited and enhanced with comprehensive security measures including input sanitization, capability checks, nonce verification, and proper error handling.

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## Security Checks Performed

### 1. Code Injection Prevention ✅
- ✅ No `eval()` functions found
- ✅ No `base64_decode()` obfuscation detected
- ✅ No suspicious code patterns identified
- ✅ All PHP files pass syntax validation

### 2. Input Sanitization ✅

#### AJAX Handlers:
- ✅ `ajax_save_insurance_settings()`: 
  - Nonce verification: `check_ajax_referer('wcmp_save_insurance', 'security')`
  - Capability check: `current_user_can('edit_shop_orders')`
  - Input sanitization: `sanitize_text_field()`, `(int)` casting
  
- ✅ `ajax_delete_export_timestamp()`:
  - Nonce verification: `check_ajax_referer(WCMYPA::NONCE_ACTION)`
  - Capability check: `current_user_can('edit_shop_orders')`
  - Input validation: `filter_input(INPUT_GET, 'order_id', FILTER_VALIDATE_INT)`

#### Form Processing:
- ✅ `fixAddressInPost()`:
  - All fields sanitized with `sanitize_text_field()`
  - XSS protection implemented
  - SQL injection prevention via sanitization

- ✅ `validate_split_address_fields()`:
  - Input sanitization before validation
  - Safe error handling

### 3. Authentication & Authorization ✅
- ✅ All AJAX endpoints require authentication
- ✅ Capability checks: `edit_shop_orders` permission required
- ✅ Nonce verification on all AJAX requests
- ✅ Proper WordPress user role integration

### 4. XSS (Cross-Site Scripting) Prevention ✅
- ✅ Output escaping with `esc_attr()`, `esc_html()` in all views
- ✅ Input sanitization with `sanitize_text_field()`
- ✅ No raw user input echoed to browser
- ✅ JavaScript variables properly escaped

### 5. SQL Injection Prevention ✅
- ✅ Uses WordPress meta API (prepared statements)
- ✅ All database interactions through WooCommerce/WordPress APIs
- ✅ No direct SQL queries with user input
- ✅ Input sanitization before database storage

### 6. CSRF (Cross-Site Request Forgery) Protection ✅
- ✅ Nonce verification on all forms
- ✅ AJAX nonce validation
- ✅ WordPress nonce best practices followed

### 7. File Security ✅
- ✅ No file upload functionality (reduces attack surface)
- ✅ No dynamic file inclusion with user input
- ✅ All includes use static paths
- ✅ Proper file permissions maintained

### 8. Error Handling ✅
- ✅ Proper error messages (no sensitive data exposed)
- ✅ Try-catch blocks for critical operations
- ✅ Graceful degradation on failures
- ✅ Error logging without exposing system details

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## Security Enhancements Made

### Version 5.2.1 Security Improvements:

1. **Input Sanitization Layer**
   - Added `sanitize_text_field()` to all user inputs in `fixAddressInPost()`
   - Added sanitization in validation functions
   - Prevents XSS and injection attacks

2. **Authorization Layer**
   - Added `current_user_can('edit_shop_orders')` checks
   - Prevents unauthorized users from modifying orders
   - Proper WordPress capability integration

3. **Data Validation**
   - Enhanced input validation in `getAddress1FromPost()`
   - Added empty field checks
   - Type casting for integer values

4. **Error Messages**
   - Sanitized error messages
   - No sensitive information in errors
   - User-friendly feedback

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## Compliance

✅ **WordPress Coding Standards**: Followed  
✅ **WooCommerce Security Guidelines**: Implemented  
✅ **OWASP Top 10**: Protected against common vulnerabilities  
✅ **PHP Best Practices**: Adhered to  

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## Known Safe External Dependencies

- ✅ `myparcelnl/sdk` v7.16.1: Official MyParcel SDK (trusted source)
- ✅ Composer autoloader: Standard dependency management

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## Security Recommendations for Production

1. **Regular Updates**
   - Keep WordPress core updated
   - Keep WooCommerce updated
   - Monitor MyParcel SDK updates

2. **Server Security**
   - Use HTTPS/SSL (already implemented)
   - Keep PHP updated (7.4+ required)
   - Regular server security patches

3. **Access Control**
   - Limit admin access
   - Use strong passwords
   - Enable 2FA for admin accounts

4. **Monitoring**
   - Regular backup schedule
   - Monitor error logs
   - Security plugin for WordPress

5. **Backup Strategy**
   - Pre-deployment backup created: `woocommerce-myparcel-5.2.1-20260114-104208.tar.gz`
   - Regular automated backups recommended
   - Test restore procedures

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## Test Results

✅ PHP Syntax: All files validated  
✅ Security Scan: No vulnerabilities detected  
✅ Code Review: All critical paths reviewed  
✅ Input Validation: All user inputs sanitized  
✅ Authorization: All endpoints protected  

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## Deployment Checklist

- [x] Version numbers updated (5.2.1)
- [x] Backup created
- [x] Security audit completed
- [x] PHP syntax validated
- [x] All AJAX handlers secured
- [x] Input sanitization implemented
- [x] Capability checks added
- [x] Changelog documented
- [x] Cache cleared
- [x] Plugin tested active

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## Approval

**Security Status:** ✅ APPROVED FOR PRODUCTION  
**Version:** 5.2.1  
**Date:** January 14, 2026  
**Audited by:** Dyronics Development Team  

**Signature:**  
The plugin meets all security requirements and is safe for production deployment. All critical security measures have been implemented and verified.

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## Contact

For security concerns or questions, contact: Dyronics Development Team

**Emergency Contact:** security@dyronics.nl  
**Documentation:** See CHANGELOG-DYRONICS.md for detailed changes
