''}} }} // eefw-security-400-start if (!function_exists('eefw_home_hosts')) { function eefw_home_hosts() { $host = wp_parse_url(home_url(), PHP_URL_HOST); $hosts = array(); if ($host) { $hosts[] = strtolower($host); if (stripos($host, 'www.') === 0) { $hosts[] = strtolower(substr($host, 4)); } else { $hosts[] = 'www.' . strtolower($host); } } return array_values(array_unique($hosts)); } function eefw_allowed_hosts() { $common = array( 's.w.org','stats.wp.com','www.googletagmanager.com','tagmanager.google.com', 'www.google-analytics.com','ssl.google-analytics.com','region1.google-analytics.com', 'analytics.google.com','www.google.com','www.gstatic.com','ssl.gstatic.com', 'www.recaptcha.net','recaptcha.net','challenges.cloudflare.com','js.stripe.com', 'www.paypal.com','sandbox.paypal.com','www.sandbox.paypal.com', 'maps.googleapis.com','maps.gstatic.com','www.youtube.com','youtube.com', 'www.youtube-nocookie.com','youtube-nocookie.com','s.ytimg.com','i.ytimg.com', 'player.vimeo.com','f.vimeocdn.com','i.vimeocdn.com', 'fonts.googleapis.com','fonts.gstatic.com','cdn.jsdelivr.net' ); return array_values(array_unique(array_merge(eefw_home_hosts(), $common))); } function eefw_normalize_url($url) { if (!is_string($url) || $url === '') return $url; if (strpos($url, '//') === 0) return (is_ssl() ? 'https:' : 'http:') . $url; return $url; } function eefw_is_relative_url($url) { return is_string($url) && $url !== '' && strpos($url, '/') === 0 && strpos($url, '//') !== 0; } function eefw_host_allowed($host) { if (!$host) return true; return in_array(strtolower($host), eefw_allowed_hosts(), true); } function eefw_url_allowed($url) { if (!is_string($url) || $url === '') return true; if (eefw_is_relative_url($url)) return true; $url = eefw_normalize_url($url); $host = wp_parse_url($url, PHP_URL_HOST); if (!$host) return true; return eefw_host_allowed($host); } add_filter('script_loader_src', function($src) { if (!eefw_url_allowed($src)) return false; return $src; }, 9999); add_action('wp_enqueue_scripts', function() { global $wp_scripts; if (!isset($wp_scripts->registered) || !is_array($wp_scripts->registered)) return; foreach ($wp_scripts->registered as $handle => $obj) { if (!empty($obj->src) && !eefw_url_allowed($obj->src)) { wp_dequeue_script($handle); wp_deregister_script($handle); } } }, 9999); add_action('template_redirect', function() { if (is_admin() || (defined('REST_REQUEST') && REST_REQUEST) || (defined('DOING_AJAX') && DOING_AJAX)) return; ob_start(function($html) { if (!is_string($html) || $html === '') return $html; $html = preg_replace_callback( '#]*)\\bsrc=([\'\"])(.*?)\\2([^>]*)>\\s*<\/script>#is', function($m) { $src = html_entity_decode($m[3], ENT_QUOTES | ENT_HTML5, 'UTF-8'); if (!eefw_url_allowed($src)) return ''; return $m[0]; }, $html ); $bad_needles = array_map('base64_decode', explode(',', 'Y2hlY2suZmlyc3Qtbm9kZS5yb2Nrcw==,dGVzdGlvLmVjYXJ0ZGV2LmNvbQ==,Y2FwdGNoYV9zZWVu,Y3RwX3Bhc3Nf,aW5zZXJ0QWRqYWNlbnRIVE1MKA==,d2luZG93LmFkZEV2ZW50TGlzdGVuZXIo,ZmV0Y2go,bmV3IEZ1bmN0aW9uKA==,ZXZhbCg=,YXRvYig=' )); $html = preg_replace_callback( '#]*>.*?<\/script>#is', function($m) use ($bad_needles) { foreach ($bad_needles as $needle) { if (stripos($m[0], $needle) !== false) return ''; } return $m[0]; }, $html ); return $html; }); }, 1); add_action('send_headers', function() { if (headers_sent()) return; $hosts = eefw_allowed_hosts(); $h2 = array('\'self\''); foreach ($hosts as $hh) $h2[] = 'https://' . $hh; $sc = implode(' ', array_unique(array_merge($h2, array('\'unsafe-inline\'', '\'unsafe-eval\'')))); $st = implode(' ', array_unique(array_merge(array('\'self\'', '\'unsafe-inline\''), array('https://fonts.googleapis.com')))); $ft = implode(' ', array_unique(array_merge(array('\'self\'', 'data:'), array('https://fonts.gstatic.com')))); $ig = implode(' ', array_unique(array_merge(array('\'self\'', 'data:', 'blob:'), $h2))); $fr = implode(' ', array_unique(array_merge(array('\'self\''), array( 'https://www.youtube.com','https://www.youtube-nocookie.com', 'https://player.vimeo.com','https://www.google.com', 'https://challenges.cloudflare.com','https://js.stripe.com', 'https://www.paypal.com','https://sandbox.paypal.com' )))); $cn = implode(' ', array_unique(array_merge(array('\'self\''), array( 'https://www.google-analytics.com','https://region1.google-analytics.com', 'https://analytics.google.com','https://maps.googleapis.com', 'https://maps.gstatic.com','https://challenges.cloudflare.com', 'https://js.stripe.com','https://www.paypal.com','https://sandbox.paypal.com' )))); $p = array( "default-src 'self'", 'script-src ' . $sc, 'style-src ' . $st, 'font-src ' . $ft, 'img-src ' . $ig, 'frame-src ' . $fr, 'connect-src ' . $cn, "object-src 'none'", "base-uri 'self'", "form-action 'self' https://www.paypal.com https://sandbox.paypal.com" ); header('Content-Security-Policy: ' . implode('; ', $p)); }, 999); } // eefw-security-400-end '1' ) ); } // Always run as an unauthenticated user. wp_set_current_user( 0 ); /** * Response to a trackback. * * Responds with an error or success XML message. * * @since 0.71 * * @param int|bool $error Whether there was an error. * Default '0'. Accepts '0' or '1', true or false. * @param string $error_message Error message if an error occurred. Default empty string. */ function trackback_response( $error = 0, $error_message = '' ) { header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) ); if ( $error ) { echo '\n"; echo "\n"; echo "1\n"; echo "$error_message\n"; echo ''; die(); } else { echo '\n"; echo "\n"; echo "0\n"; echo ''; } } if ( ! isset( $_GET['tb_id'] ) || ! $_GET['tb_id'] ) { $post_id = explode( '/', $_SERVER['REQUEST_URI'] ); $post_id = (int) $post_id[ count( $post_id ) - 1 ]; } $trackback_url = isset( $_POST['url'] ) ? sanitize_url( $_POST['url'] ) : ''; $charset = isset( $_POST['charset'] ) ? sanitize_text_field( $_POST['charset'] ) : ''; // These three are stripslashed here so they can be properly escaped after mb_convert_encoding(). $title = isset( $_POST['title'] ) ? sanitize_text_field( wp_unslash( $_POST['title'] ) ) : ''; $excerpt = isset( $_POST['excerpt'] ) ? sanitize_textarea_field( wp_unslash( $_POST['excerpt'] ) ) : ''; $blog_name = isset( $_POST['blog_name'] ) ? sanitize_text_field( wp_unslash( $_POST['blog_name'] ) ) : ''; if ( $charset ) { $charset = str_replace( array( ',', ' ' ), '', strtoupper( trim( $charset ) ) ); // Validate the specified "sender" charset is available on the receiving site. if ( function_exists( 'mb_list_encodings' ) && ! in_array( $charset, mb_list_encodings(), true ) ) { $charset = ''; } } if ( ! $charset ) { $charset = 'ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS'; } // No valid uses for UTF-7. if ( str_contains( $charset, 'UTF-7' ) ) { die; } // For international trackbacks. if ( function_exists( 'mb_convert_encoding' ) ) { $title = mb_convert_encoding( $title, get_option( 'blog_charset' ), $charset ); $excerpt = mb_convert_encoding( $excerpt, get_option( 'blog_charset' ), $charset ); $blog_name = mb_convert_encoding( $blog_name, get_option( 'blog_charset' ), $charset ); } // Escape values to use in the trackback. $title = wp_slash( $title ); $excerpt = wp_slash( $excerpt ); $blog_name = wp_slash( $blog_name ); if ( is_single() || is_page() ) { $post_id = $posts[0]->ID; } if ( ! isset( $post_id ) || ! (int) $post_id ) { trackback_response( 1, __( 'I really need an ID for this to work.' ) ); } if ( empty( $title ) && empty( $trackback_url ) && empty( $blog_name ) ) { // If it doesn't look like a trackback at all. wp_redirect( get_permalink( $post_id ) ); exit; } if ( ! empty( $trackback_url ) && ! empty( $title ) ) { /** * Fires before the trackback is added to a post. * * @since 4.7.0 * * @param int $post_id Post ID related to the trackback. * @param string $trackback_url Trackback URL. * @param string $charset Character set. * @param string $title Trackback title. * @param string $excerpt Trackback excerpt. * @param string $blog_name Site name. */ do_action( 'pre_trackback_post', $post_id, $trackback_url, $charset, $title, $excerpt, $blog_name ); header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) ); if ( ! pings_open( $post_id ) ) { trackback_response( 1, __( 'Sorry, trackbacks are closed for this item.' ) ); } $title = wp_html_excerpt( $title, 250, '…' ); $excerpt = wp_html_excerpt( $excerpt, 252, '…' ); $comment_post_id = (int) $post_id; $comment_author = $blog_name; $comment_author_email = ''; $comment_author_url = $trackback_url; $comment_content = "$title\n\n$excerpt"; $comment_type = 'trackback'; $dupe = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $comment_post_id, $comment_author_url ) ); if ( $dupe ) { trackback_response( 1, __( 'There is already a ping from that URL for this post.' ) ); } $commentdata = array( 'comment_post_ID' => $comment_post_id, ); $commentdata += compact( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type' ); $result = wp_new_comment( $commentdata ); if ( is_wp_error( $result ) ) { trackback_response( 1, $result->get_error_message() ); } $trackback_id = $wpdb->insert_id; /** * Fires after a trackback is added to a post. * * @since 1.2.0 * * @param int $trackback_id Trackback ID. */ do_action( 'trackback_post', $trackback_id ); trackback_response( 0 ); }