diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/YarnUI2.md b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/YarnUI2.md
index f646d3df397..9f82031d972 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/YarnUI2.md
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/YarnUI2.md
@@ -41,3 +41,8 @@ origin (CORS) support.
 Use it
 -------------
 Open your browser, go to `rm-address:8088/ui2` and try it!
+
+Notes
+-------------
+
+- This UI framework is not verified under security environment, please use with caution under security environment.