diff --git a/library/Icinga/Web/Widget/FilterEditor.php b/library/Icinga/Web/Widget/FilterEditor.php
index df8bef9c6..a15cd9d94 100644
--- a/library/Icinga/Web/Widget/FilterEditor.php
+++ b/library/Icinga/Web/Widget/FilterEditor.php
@@ -521,7 +521,7 @@ class FilterEditor extends AbstractWidget
         return sprintf(
             '<input type="text" name="%s" value="%s" />',
             $this->elementId('value', $filter),
-            $value
+            $this->view()->escape($value)
         );
     }