diff --git a/addons/web_editor/static/src/js/backend/html_field.js b/addons/web_editor/static/src/js/backend/html_field.js
index 9632128e211..01d5518e726 100644
--- a/addons/web_editor/static/src/js/backend/html_field.js
+++ b/addons/web_editor/static/src/js/backend/html_field.js
@@ -373,6 +373,8 @@ export class HtmlField extends Component {
             const t = document.createElement('T');
             t.setAttribute('t-out', dynamicPlaceholder);
             this.wysiwyg.odooEditor.execCommand('insert', t);
+            // Ensure the dynamic placeholder <t> element is sanitized.
+            this.wysiwyg.odooEditor.sanitize(t);
         }
     }
     onDynamicPlaceholderClose() {