diff --git a/app/controllers/categories_controller.rb b/app/controllers/categories_controller.rb
index 05b36ba3..dd75c675 100644
--- a/app/controllers/categories_controller.rb
+++ b/app/controllers/categories_controller.rb
@@ -32,6 +32,10 @@ class CategoriesController < ApplicationController
 
   private
   def render_react
-    render "/common/index", :layout => false
+    if LocalSetting.first.try(:exam) && !current_user.admin?
+      render_403
+    else
+      render "/common/index", :layout => false
+    end
   end
 end
diff --git a/app/controllers/forums_controller.rb b/app/controllers/forums_controller.rb
index afb5b7dd..c1dae86e 100644
--- a/app/controllers/forums_controller.rb
+++ b/app/controllers/forums_controller.rb
@@ -28,7 +28,11 @@ class ForumsController < ApplicationController
 
   private
   def render_react
-    render "/common/index", :layout => false
+   if LocalSetting.first.try(:exam) && !current_user.admin?
+     render_403
+   else
+     render "/common/index", :layout => false
+   end
   end
 
 end