function rs_wpss_gf_spam_check($form) { /*** * Checks Gravity Forms submissions for spam * Added 1.8.9.9, Modified 1.9.5 ***/ if (rs_wpss_is_user_admin()) { return $form; } global $spamshield_options; if (empty($spamshield_options)) { $spamshield_options = get_option('spamshield_options'); } rs_wpss_update_session_data($spamshield_options); if (!empty($spamshield_options['disable_gf_shield'])) { return $form; } /* BYPASS - HOOK */ $gfsc_bypass = apply_filters('wpss_gf_spam_check_bypass', FALSE); if (!empty($gfsc_bypass)) { return $form; } /* IP / PROXY INFO - BEGIN */ global $wpss_ip_proxy_info; if (empty($wpss_ip_proxy_info)) { $wpss_ip_proxy_info = rs_wpss_ip_proxy_info(); } extract($wpss_ip_proxy_info); /* IP / PROXY INFO - END */ $user_agent = rs_wpss_get_user_agent(); /* BYPASS - Ecommerce Plugins */ if ((rs_wpss_is_ssl() || !empty($_POST['add-to-cart']) || !empty($_POST['add_to_cart']) || !empty($_POST['addtocart']) || !empty($_POST['product-id']) || !empty($_POST['product_id']) || !empty($_POST['productid']) || preg_match("~^PayPal\\ IPN~", $user_agent) && preg_match("~(^|\\.)paypal\\.com\$~", $reverse_dns)) && rs_wpss_is_ecom_enabled()) { return $form; } $gf_filter_status = $wpss_error_code = ''; $gf_jsck_error = $gf_badrobot_error = FALSE; $form_type = 'gravity forms'; $pref = 'GF-'; $errors_3p = array(); $error_txt = rs_wpss_error_txt(); $server_name = WPSS_SERVER_NAME; $server_email_domain = rs_wpss_get_email_domain($server_name); $gf_serial_post = serialize($_POST); $form_auth_dat = array('comment_author' => '', 'comment_author_email' => '', 'comment_author_url' => ''); /* JS/JQUERY CHECK */ $wpss_key_values = rs_wpss_get_key_values(); $wpss_jq_key = $wpss_key_values['wpss_jq_key']; $wpss_jq_val = $wpss_key_values['wpss_jq_val']; if (TRUE === WPSS_COMPAT_MODE || defined('WPSS_SOFT_COMPAT_MODE')) { /* Fall back to FVFJS Keys instead of jQuery keys from jscripts.php */ $wpss_jq_key = $wpss_key_values['wpss_js_key']; $wpss_jq_val = $wpss_key_values['wpss_js_val']; } $wpss_jsck_jquery_val = !empty($_POST[$wpss_jq_key]) ? $_POST[$wpss_jq_key] : ''; if ($wpss_jsck_jquery_val !== $wpss_jq_val) { $wpss_error_code .= ' ' . $pref . 'JQHFT-7'; $gf_jsck_error = TRUE; $err_cod = 'jsck_error'; $err_msg = __('Sorry, there was an error. Please be sure JavaScript and Cookies are enabled in your browser and try again.', WPSS_PLUGIN_NAME); $errors_3p[$err_cod] = $err_msg; } /* EMAIL BLACKLIST */ foreach ($_POST as $k => $v) { if (!is_string($v)) { continue; } $k_lc = rs_wpss_casetrans('lower', $k); $v_lc = rs_wpss_casetrans('lower', trim(stripslashes($v))); if (is_email($v_lc)) { $email_domain = rs_wpss_parse_email($v_lc, 'domain'); if ($email_domain === $server_email_domain) { continue; } if (rs_wpss_email_blacklist_chk($v_lc)) { $wpss_error_code .= ' ' . $pref . '9200E-BL'; if ($gf_jsck_error !== TRUE) { $err_cod = 'blacklist_email_error'; $err_msg = __('Sorry, that email address is not allowed!') . ' ' . __('Please enter a valid email address.'); $errors_3p[$err_cod] = $err_msg; } break; } } } /* CONTACT FORM CONTENT BLACKLIST */ foreach ($_POST as $k => $v) { if (!is_string($v)) { continue; } /* $k_lc = rs_wpss_casetrans('lower',$k); */ $v_lc = rs_wpss_casetrans('lower', trim(stripslashes($v))); if (rs_wpss_cf_content_blacklist_chk($v_lc)) { $wpss_error_code .= ' ' . $pref . '10400C-BL'; if ($gf_jsck_error !== TRUE) { $err_cod = 'blacklist_content_error'; $err_msg = __('Message appears to be spam.', WPSS_PLUGIN_NAME); $errors_3p[$err_cod] = $err_msg; } break; } } /* BAD ROBOT BLACKLIST */ $bad_robot_filter_data = rs_wpss_bad_robot_blacklist_chk($form_type, $gf_filter_status); $gf_filter_status = $bad_robot_filter_data['status']; $bad_robot_blacklisted = $bad_robot_filter_data['blacklisted']; if (!empty($bad_robot_blacklisted)) { $wpss_error_code .= $bad_robot_filter_data['error_code']; $gf_badrobot_error = TRUE; if ($gf_jsck_error !== TRUE) { $err_cod = 'badrobot_error'; $err_msg = __('That action is currently not allowed.'); $errors_3p[$err_cod] = $err_msg; } } /* BLACKLISTED USER */ if (empty($wpss_error_code) && rs_wpss_ubl_cache()) { $wpss_error_code .= ' ' . $pref . '0-BL'; $err_cod = 'blacklisted_user_error'; $err_msg = __('That action is currently not allowed.'); /* TO DO: TRANSLATE */ $errors_3p[$err_cod] = $err_msg; } $wpss_error_code = trim($wpss_error_code); if (strpos($wpss_error_code, '0-BL') !== FALSE) { rs_wpss_append_log_data('Blacklisted user detected. Gravity Forms have been temporarily disabled to prevent spam. ERROR CODE: ' . $wpss_error_code, FALSE); } if (!empty($wpss_error_code)) { $spam = TRUE; rs_wpss_update_accept_status($form_auth_dat, 'r', 'Line: ' . __LINE__, $wpss_error_code); if (!empty($spamshield_options['comment_logging'])) { rs_wpss_log_data($form_auth_dat, $wpss_error_code, $form_type, $gf_serial_post); } } else { rs_wpss_update_accept_status($form_auth_dat, 'a', 'Line: ' . __LINE__); if (!empty($spamshield_options['comment_logging']) && !empty($spamshield_options['comment_logging_all'])) { rs_wpss_log_data($form_auth_dat, $wpss_error_code, $form_type, $gf_serial_post); } } /* Now output error message */ if (!empty($wpss_error_code)) { $error_msg = ''; foreach ($errors_3p as $c => $m) { $error_msg .= '<strong>' . $error_txt . ':</strong> ' . $m . '<br /><br />' . WPSS_EOL; } $args = array('response' => '403'); wp_die($error_msg, '', $args); } }
public static function early_post_intercept() { /** * SECURITY - Checks all incoming POST requests early for malicious behavior * Added 1.9.7.8 */ if ('POST' !== $_SERVER['REQUEST_METHOD'] || rs_wpss_is_local_request() || is_user_logged_in()) { return; } global $spamshield_options; if (empty($spamshield_options)) { $spamshield_options = get_option('spamshield_options'); } if (!empty($spamshield_options['disable_misc_form_shield'])) { return; } $url = rs_wpss_get_url(); $url_lc = rs_wpss_casetrans('lower', $url); $req_uri = $_SERVER['REQUEST_URI']; $req_uri_lc = rs_wpss_casetrans('lower', $req_uri); $epc_filter_status = $wpss_error_code = $log_pref = ''; $epc_jsck_error = $epc_badrobot_error = FALSE; $form_type = 'misc form'; $pref = 'EPC-'; $errors_3p = array(); $error_txt = rs_wpss_error_txt(); $server_name = WPSS_SERVER_NAME; $server_email_domain = rs_wpss_get_email_domain($server_name); $epc_serial_post = json_encode($_POST); $form_auth_dat = array('comment_author' => '', 'comment_author_email' => '', 'comment_author_url' => ''); $blocked = FALSE; $c = array('name' => '', 'value' => '1', 'expire' => time() + 60 * 60 * 24 * 365 * 1, 'path' => '/', 'domain' => rs_wpss_get_cookie_domain(), 'secure' => FALSE, 'httponly' => FALSE); if (rs_wpss_is_xmlrpc()) { if (empty($_POST) || !empty($_GET)) { $blocked = TRUE; } rs_wpss_start_session(); $c['name'] = 'P_XMLRPC'; } if (rs_wpss_is_doing_ajax()) { if (empty($_POST) && empty($_GET) || empty($_REQUEST['action'])) { $wpss_error_code .= ' ' . $pref . 'FAR1020'; $err_cod = 'fake_ajax_request_error'; $err_msg = __('That action is currently not allowed.'); $errors_3p[$err_cod] = $err_msg; } } if (rs_wpss_skiddie_ua_check()) { $wpss_error_code .= ' ' . $pref . 'UA1004'; $err_cod = 'badrobot_skiddie_error'; $err_msg = __('That action is currently not allowed.'); $errors_3p[$err_cod] = $err_msg; } if (rs_wpss_ubl_cache()) { if (TRUE === WPSS_IP_BAN_ENABLE && rs_wpss_is_xmlrpc()) { self::ip_ban(); } $wpss_error_code .= ' ' . $pref . '0-BL'; $err_cod = 'blacklisted_user_error'; $err_msg = __('That action is currently not allowed.'); $errors_3p[$err_cod] = $err_msg; } if (!empty($c['name'])) { /* Setting cookie to honeypot bad actors */ @setcookie($c['name'], $c['value'], $c['expire'], $c['path'], $c['domain'], $c['secure'], $c['httponly']); } if (!empty($wpss_error_code)) { rs_wpss_update_accept_status($form_auth_dat, 'r', 'Line: ' . __LINE__, $wpss_error_code); if (!empty($spamshield_options['comment_logging'])) { rs_wpss_log_data($form_auth_dat, $wpss_error_code, $form_type, $epc_serial_post); } } else { rs_wpss_update_accept_status($form_auth_dat, 'a', 'Line: ' . __LINE__); } /* Now output error message */ if (!empty($wpss_error_code)) { $error_msg = ''; foreach ($errors_3p as $c => $m) { $error_msg .= '<strong>' . $error_txt . ':</strong> ' . $m . '<br /><br />' . WPSS_EOL; } WP_SpamShield::wp_die($error_msg, TRUE); } }