diff --git a/src/Umbraco.Web/umbraco.presentation/umbraco/webservices/legacyAjaxCalls.asmx.cs b/src/Umbraco.Web/umbraco.presentation/umbraco/webservices/legacyAjaxCalls.asmx.cs
index 037590d4d5..c377250f43 100644
--- a/src/Umbraco.Web/umbraco.presentation/umbraco/webservices/legacyAjaxCalls.asmx.cs
+++ b/src/Umbraco.Web/umbraco.presentation/umbraco/webservices/legacyAjaxCalls.asmx.cs
@@ -163,6 +163,8 @@ namespace umbraco.presentation.webservices
         [ScriptMethod]
         public string ProgressStatus(string Key)
         {
+            AuthorizeRequest(true);
+
             return Application[helper.Request("key")].ToString();
         }