diff --git a/com.woltlab.wcf/templates/shared_form.tpl b/com.woltlab.wcf/templates/shared_form.tpl
index cda2f88b36e..9ecac272d9a 100644
--- a/com.woltlab.wcf/templates/shared_form.tpl
+++ b/com.woltlab.wcf/templates/shared_form.tpl
@@ -82,3 +82,11 @@
 		FormBuilderFieldDependencyManager.checkDependencies();
 	});
 </script>
+
+{if !$form->isAjax()}
+	<script data-relocate="true">
+		require(['WoltLabSuite/Core/Form/Builder/FormGuard'], ({ setup }) => {
+			setup(document.getElementById('{unsafe:$form->getId()|encodeJS}'));
+		});
+	</script>
+{/if}
diff --git a/ts/WoltLabSuite/Core/Form/Builder/FormGuard.ts b/ts/WoltLabSuite/Core/Form/Builder/FormGuard.ts
new file mode 100644
index 00000000000..ba976680de3
--- /dev/null
+++ b/ts/WoltLabSuite/Core/Form/Builder/FormGuard.ts
@@ -0,0 +1,16 @@
+/**
+ * Prevents multiple submits of the same form by disabling the submit button.
+ *
+ * @author    Marcel Werk
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license   GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since     6.2
+ */
+
+export function setup(form: HTMLFormElement) {
+  form.addEventListener("submit", () => {
+    form.querySelectorAll<HTMLInputElement>("input[type=submit]").forEach((button) => {
+      button.disabled = true;
+    });
+  });
+}
diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/FormGuard.js b/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/FormGuard.js
new file mode 100644
index 00000000000..74210655fdd
--- /dev/null
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/Form/Builder/FormGuard.js
@@ -0,0 +1,20 @@
+/**
+ * Prevents multiple submits of the same form by disabling the submit button.
+ *
+ * @author    Marcel Werk
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license   GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since     6.2
+ */
+define(["require", "exports"], function (require, exports) {
+    "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
+    exports.setup = setup;
+    function setup(form) {
+        form.addEventListener("submit", () => {
+            form.querySelectorAll("input[type=submit]").forEach((button) => {
+                button.disabled = true;
+            });
+        });
+    }
+});