mirror of
https://gitlab.com/ArkHost/WP-Security-Pack.git
synced 2026-09-19 17:37:30 +02:00
v1.0
This commit is contained in:
Yuri Karamian
@@ -0,0 +1,331 @@
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<?php
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/**
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* Security hardening for Security Pack.
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*
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* @package ArkHost_Security_Pack
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*/
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// Prevent direct access.
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* Hardening class for security enhancements.
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*/
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class ARKSP_Hardening {
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/**
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* Constructor.
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*/
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public function __construct() {
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// Disable XML-RPC.
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if ( ARKSP_Plugin::get_setting( 'disable_xmlrpc', true ) ) {
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add_filter( 'xmlrpc_enabled', '__return_false' );
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add_filter( 'wp_headers', array( $this, 'remove_xmlrpc_headers' ) );
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add_action( 'wp', array( $this, 'block_xmlrpc_requests' ), 1 );
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}
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// Disable file editing.
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if ( ARKSP_Plugin::get_setting( 'disable_file_editing', true ) ) {
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$this->disable_file_editing();
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}
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// Remove WordPress version.
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if ( ARKSP_Plugin::get_setting( 'remove_wp_version', true ) ) {
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add_filter( 'the_generator', '__return_empty_string' );
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remove_action( 'wp_head', 'wp_generator' );
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add_filter( 'style_loader_src', array( $this, 'remove_version_strings' ), 10, 2 );
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add_filter( 'script_loader_src', array( $this, 'remove_version_strings' ), 10, 2 );
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}
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// Add security headers.
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if ( ARKSP_Plugin::get_setting( 'add_security_headers', true ) ) {
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add_action( 'send_headers', array( $this, 'add_security_headers' ) );
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}
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// Restrict REST API.
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if ( ARKSP_Plugin::get_setting( 'restrict_rest_api', true ) ) {
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add_filter( 'rest_authentication_errors', array( $this, 'restrict_rest_api' ) );
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}
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// Disable application passwords for non-admins.
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if ( ARKSP_Plugin::get_setting( 'disable_application_passwords', false ) ) {
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add_filter( 'wp_is_application_passwords_available', '__return_false' );
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}
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// Remove unnecessary headers.
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add_action( 'init', array( $this, 'remove_unnecessary_headers' ) );
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// Disable user enumeration.
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if ( ARKSP_Plugin::get_setting( 'disable_user_enumeration', true ) ) {
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add_action( 'init', array( $this, 'block_author_scanning' ) );
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add_filter( 'rest_endpoints', array( $this, 'restrict_users_endpoint' ) );
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add_filter( 'oembed_response_data', array( $this, 'remove_author_from_oembed' ) );
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}
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// Disable pingbacks/trackbacks.
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if ( ARKSP_Plugin::get_setting( 'disable_pingbacks', true ) ) {
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add_filter( 'xmlrpc_methods', array( $this, 'disable_pingback_methods' ) );
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add_filter( 'wp_headers', array( $this, 'remove_pingback_header' ) );
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add_filter( 'pings_open', '__return_false', 20, 2 );
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}
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}
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/**
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* Remove XML-RPC related headers.
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*
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* @param array $headers HTTP headers.
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* @return array
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*/
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public function remove_xmlrpc_headers( $headers ) {
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unset( $headers['X-Pingback'] );
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return $headers;
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}
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/**
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* Block direct XML-RPC requests.
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*/
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public function block_xmlrpc_requests() {
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// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
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$request_uri = isset( $_SERVER['REQUEST_URI'] ) ? wp_unslash( $_SERVER['REQUEST_URI'] ) : '';
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if ( strpos( $request_uri, 'xmlrpc.php' ) !== false ) {
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status_header( 403 );
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exit( 'XML-RPC is disabled.' );
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}
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}
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/**
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* Disable file editing in dashboard.
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*/
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private function disable_file_editing() {
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if ( ! defined( 'DISALLOW_FILE_EDIT' ) ) {
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define( 'DISALLOW_FILE_EDIT', true ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedConstantFound -- WordPress core constant.
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}
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}
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/**
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* Remove version strings from scripts and styles.
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*
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* @param string $src Source URL.
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* @param string $handle Handle name.
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* @return string
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*/
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public function remove_version_strings( $src, $handle ) {
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if ( strpos( $src, 'ver=' ) !== false ) {
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$src = remove_query_arg( 'ver', $src );
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}
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return $src;
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}
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/**
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* Add security headers.
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*/
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public function add_security_headers() {
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// Don't add headers for admin pages if user is logged in.
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if ( is_admin() && is_user_logged_in() ) {
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// Still add some basic headers.
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header( 'X-Content-Type-Options: nosniff' );
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return;
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}
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// Get header settings.
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$headers = ARKSP_Plugin::get_setting( 'security_headers', $this->get_default_headers() );
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// X-Content-Type-Options.
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if ( ! empty( $headers['x_content_type_options'] ) ) {
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header( 'X-Content-Type-Options: ' . $headers['x_content_type_options'] );
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}
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// X-Frame-Options.
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if ( ! empty( $headers['x_frame_options'] ) ) {
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header( 'X-Frame-Options: ' . $headers['x_frame_options'] );
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}
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// X-XSS-Protection.
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if ( ! empty( $headers['x_xss_protection'] ) ) {
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header( 'X-XSS-Protection: ' . $headers['x_xss_protection'] );
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}
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// Referrer-Policy.
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if ( ! empty( $headers['referrer_policy'] ) ) {
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header( 'Referrer-Policy: ' . $headers['referrer_policy'] );
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}
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// Permissions-Policy.
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if ( ! empty( $headers['permissions_policy'] ) ) {
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header( 'Permissions-Policy: ' . $headers['permissions_policy'] );
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}
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// Content-Security-Policy.
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if ( ! empty( $headers['content_security_policy'] ) ) {
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header( 'Content-Security-Policy: ' . $headers['content_security_policy'] );
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}
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// Strict-Transport-Security (HSTS).
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if ( ! empty( $headers['strict_transport_security'] ) && is_ssl() ) {
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header( 'Strict-Transport-Security: ' . $headers['strict_transport_security'] );
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}
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}
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/**
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* Get default security headers.
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*
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* @return array
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*/
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public function get_default_headers() {
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return array(
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'x_content_type_options' => 'nosniff',
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'x_frame_options' => 'SAMEORIGIN',
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'x_xss_protection' => '1; mode=block',
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'referrer_policy' => 'strict-origin-when-cross-origin',
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'permissions_policy' => 'geolocation=(), microphone=(), camera=()',
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'content_security_policy' => '',
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'strict_transport_security' => 'max-age=31536000; includeSubDomains',
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);
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}
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/**
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* Restrict REST API to authenticated users.
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*
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* @param WP_Error|null|bool $result Authentication result.
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* @return WP_Error|null|bool
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*/
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public function restrict_rest_api( $result ) {
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// If there's already an error, return it.
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if ( is_wp_error( $result ) ) {
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return $result;
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}
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// Allow if user is logged in.
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if ( is_user_logged_in() ) {
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return $result;
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}
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// Get allowed REST routes.
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$allowed_routes = ARKSP_Plugin::get_setting( 'rest_api_allowed_routes', array() );
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// Always allow some essential routes.
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$essential_routes = array(
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'/wp/v2/oembed',
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'/wp-site-health',
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);
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$allowed_routes = array_merge( $allowed_routes, $essential_routes );
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// Get current route.
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$current_route = $GLOBALS['wp']->query_vars['rest_route'] ?? '';
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// Check if current route is allowed.
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foreach ( $allowed_routes as $route ) {
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if ( strpos( $current_route, $route ) === 0 ) {
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return $result;
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}
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}
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// Block unauthenticated access.
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return new WP_Error(
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'rest_not_logged_in',
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__( 'You must be authenticated to access this endpoint.', 'arkhost-security-pack' ),
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array( 'status' => 401 )
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);
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}
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/**
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* Remove unnecessary headers.
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*/
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public function remove_unnecessary_headers() {
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// Remove Really Simple Discovery link.
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remove_action( 'wp_head', 'rsd_link' );
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// Remove Windows Live Writer manifest link.
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remove_action( 'wp_head', 'wlwmanifest_link' );
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// Remove shortlink.
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remove_action( 'wp_head', 'wp_shortlink_wp_head' );
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// Remove feed links.
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if ( ARKSP_Plugin::get_setting( 'remove_feed_links', false ) ) {
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remove_action( 'wp_head', 'feed_links', 2 );
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remove_action( 'wp_head', 'feed_links_extra', 3 );
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}
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}
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/**
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* Block author scanning via ?author=N URLs.
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*/
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public function block_author_scanning() {
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if ( is_admin() ) {
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return;
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}
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// Block ?author=N requests for non-logged-in users.
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended
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if ( ! is_user_logged_in() && isset( $_GET['author'] ) ) {
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wp_safe_redirect( home_url(), 301 );
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exit;
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}
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}
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/**
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* Restrict REST API users endpoint to authenticated users.
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*
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* @param array $endpoints REST API endpoints.
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* @return array
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*/
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public function restrict_users_endpoint( $endpoints ) {
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if ( is_user_logged_in() ) {
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return $endpoints;
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}
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// Remove users endpoint for unauthenticated requests.
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if ( isset( $endpoints['/wp/v2/users'] ) ) {
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unset( $endpoints['/wp/v2/users'] );
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}
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if ( isset( $endpoints['/wp/v2/users/(?P<id>[\d]+)'] ) ) {
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unset( $endpoints['/wp/v2/users/(?P<id>[\d]+)'] );
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}
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return $endpoints;
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}
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/**
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* Remove author information from oEmbed responses.
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*
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* @param array $data oEmbed response data.
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* @return array
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*/
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public function remove_author_from_oembed( $data ) {
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if ( isset( $data['author_name'] ) ) {
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unset( $data['author_name'] );
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}
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if ( isset( $data['author_url'] ) ) {
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unset( $data['author_url'] );
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}
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return $data;
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}
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/**
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* Disable pingback XML-RPC methods.
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*
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* @param array $methods XML-RPC methods.
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* @return array
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*/
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public function disable_pingback_methods( $methods ) {
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unset( $methods['pingback.ping'] );
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unset( $methods['pingback.extensions.getPingbacks'] );
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return $methods;
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}
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/**
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* Remove X-Pingback header.
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*
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* @param array $headers HTTP headers.
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* @return array
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*/
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public function remove_pingback_header( $headers ) {
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unset( $headers['X-Pingback'] );
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return $headers;
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}
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}
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