diff --git a/horde/admin/groups.php b/horde/admin/groups.php
index 0204603536b..60e06acbc4c 100644
--- a/horde/admin/groups.php
+++ b/horde/admin/groups.php
@@ -211,7 +211,7 @@
     $tree->addNode(array(
         'id' => $id,
         'parent' => null,
-        'label' => $node,
+        'label' => htmlspecialchars($node),
         'expanded' => false,
         'params' => $group_node + $node_params,
         'right' => array($spacer, $delete_link)