Feature - Google Analytics - Use Regex to validate UA as per https://support.google.com/analytics/answer/9310895

server/modules/google-analytics.js

@@ -3,8 +3,13 @@ let GoogleAnalytics = (() => {
         return "<script async src=\"https://www.googletagmanager.com/gtag/js?id=" + tagId + "\"></script>" +
             "<script>window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date());gtag('config', '" + tagId + "'); </script>";
     }
+    function isValidTag(tagInput) {
+        const re = /^\w{1,2}-\d{8}$/g;
+        return tagInput.match(re) != null;
+    }
     return {
-        getGoogleAnalyticsScript: getGoogleAnalyticsScript
+        getGoogleAnalyticsScript: getGoogleAnalyticsScript,
+        isValidTag: isValidTag
     };
 })();
 

server/socket-handlers/status-page-socket-handler.js

@@ -7,6 +7,7 @@ const Database = require("../database");
 const apicache = require("../modules/apicache");
 const StatusPage = require("../model/status_page");
 const { UptimeKumaServer } = require("../uptime-kuma-server");
+const googleAnalytics = require("../modules/google-analytics");
 
 /**
  * Socket handlers for status page
@@ -163,7 +164,7 @@ module.exports.statusPageSocketHandler = (socket) => {
             statusPage.custom_css = config.customCSS;
             statusPage.show_powered_by = config.showPoweredBy;
             statusPage.modified_date = R.isoDateTime();
-            statusPage.google_analytics_tag_id = config.googleAnalyticsId;
+            statusPage.google_analytics_tag_id = googleAnalytics.isValidTag(config.googleAnalyticsId) ? config.googleAnalyticsId : "";
 
             await R.store(statusPage);