This document outlines the security measures implemented in the DevXpert WordPress plugin to ensure safe operation and protect against common vulnerabilities.

• Primary Check: All admin functionality requires manage_options capability
• Implementation: current_user_can('manage_options') checks throughout the plugin
• Files: All AJAX handlers and admin pages verify user permissions

• Plugin only loads for administrators or when WP_DEBUG is enabled
• Frontend assets only load for users with manage_options capability

• All AJAX requests require valid nonces via check_ajax_referer('devxpert_nonce', 'nonce')
• Nonces are created with wp_create_nonce('devxpert_nonce')
• Nonces are localized to JavaScript for frontend requests

// Creating nonces
'nonce' => \wp_create_nonce('devxpert_nonce')

// Verifying nonces
\check_ajax_referer('devxpert_nonce', 'nonce');

• Text Fields: sanitize_text_field() for single-line text
• Textarea: sanitize_textarea_field() for multi-line text
• Numbers: intval() for numeric inputs

$setting = \sanitize_text_field($_POST['setting']);
$value = \sanitize_text_field($_POST['value']);
$template_name = \sanitize_text_field($_POST['template_name']);
$hook_name = \sanitize_text_field($_POST['hook_name']);

• General HTML: esc_html() for safe HTML output
• Attributes: esc_attr() for HTML attributes
• URLs: esc_url() for URL outputs

echo \esc_html($theme->get('Name'));
echo \esc_attr($plugin_file);
echo \esc_html($hook_name);

• All AJAX endpoints verify nonces
• All AJAX endpoints check user capabilities
• No nopriv AJAX actions (admin-only access)

• Proper error responses with sanitized messages
• No sensitive information in error responses
• Consistent error format across all endpoints

• All file operations use WordPress path functions
• Directory traversal protection via ABSPATH checks
• File existence checks before operations

$file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
if (file_exists($file)) {
    require $file;
}

• Use WordPress options API (get_option, update_option)
• Proper sanitization before database operations
• No direct SQL queries (uses WordPress APIs)

$settings = \get_option('devxpert_settings', []);
$settings[$setting] = $value === 'true' || $value === '1';
\update_option('devxpert_settings', $settings);

• Consistent use of devxpert text domain
• Proper escaping with translation functions
• Localized strings for user-facing messages

\esc_html__('Setting saved successfully!', 'devxpert')
\esc_attr__('Hook name copied to clipboard!', 'devxpert')
\__('Insufficient permissions.', 'devxpert')

• All user-facing strings localized via wp_localize_script
• No hardcoded strings in JavaScript
• Proper escaping of localized data

• Nonces included in all AJAX requests
• Error handling for failed requests
• Input validation on client side

• All classes use DevXpert\ namespace
• Proper autoloading prevents direct file access
• Namespace isolation from other plugins

• index.php files in all directories prevent directory listing
• Direct file access prevention via ABSPATH checks
• Plugin constants for secure path references

• Follows WordPress coding standards
• Uses WordPress core functions and APIs
• Proper hook usage and action/filter implementation

• Validate all user inputs
• Sanitize data before processing
• Escape output before display

• Graceful error handling
• No sensitive information in error messages
• Proper logging without exposing internals

• No inline CSS or JavaScript
• External file loading for all assets
• Proper asset versioning and caching

• User capability checks implemented
• Nonce verification for all AJAX requests
• Input sanitization for all user inputs
• Output escaping for all displayed data
• No nopriv AJAX actions
• Proper file system security
• Database security via WordPress APIs
• Internationalization with proper escaping
• JavaScript security with localized strings
• Plugin structure security
• Error handling without information disclosure
• No inline CSS/JS (external files only)

1. Environment: Test in development environment first
2. Permissions: Ensure proper file permissions (755 for directories, 644 for files)
3. Updates: Keep WordPress and plugins updated
4. Monitoring: Monitor error logs for any security issues
5. Backup: Regular backups before plugin updates

If you discover a security vulnerability in the DevXpert plugin, please report it responsibly:

1. Email: [Security contact information]
2. GitHub: Create a private security issue
3. Response: We will respond within 48 hours
4. Disclosure: Coordinated disclosure timeline

Last Updated: July 26, 2025
Version: 1.0.0
WordPress Version: 5.0+
PHP Version: 7.4+