diff --git a/php/controller/createArticle-controller.php b/php/controller/createArticle-controller.php
index 2022393..5246566 100644
--- a/php/controller/createArticle-controller.php
+++ b/php/controller/createArticle-controller.php
@@ -24,6 +24,12 @@ require_once '../validator/article-validator.php';
             $tags = $_POST['tags'] ?? '';
 
             // -------------------------------- Validierung der Daten: -------------------------
+            if (!articleAuthorValidator($author)) {
+                $_SESSION["message"] = "author_not_valid";
+                header("location: ../../index.php?pfad=createArticle");
+                exit();
+            }
+
             if (!articleTitleValidator($title)) {
                 $_SESSION["message"] = "invalid_title";
                 header("location: ../../index.php?pfad=createArticle");