diff --git a/components/ILIAS/Test/classes/class.ilTestPlayerAbstractGUI.php b/components/ILIAS/Test/classes/class.ilTestPlayerAbstractGUI.php
index f3a03fa28a82..aa5dfa2319cc 100755
--- a/components/ILIAS/Test/classes/class.ilTestPlayerAbstractGUI.php
+++ b/components/ILIAS/Test/classes/class.ilTestPlayerAbstractGUI.php
@@ -3239,8 +3239,12 @@ protected function getTestPlayerTitle(): string
             // this is a placeholder solution with inline html tags to differentiate the different elements
             // should be removed when a title component with grouping and visual weighting is available
             // see:  https://github.com/ILIAS-eLearning/ILIAS/pull/7311
-            $pax_name_value = "<span class='il-test-kiosk-head__participant-name'>"
-                . $this->user->getFullname() . "</span>";
+            $pax_name_value = $this->ui_factory->legacy(
+                sprintf(
+                    "<span class='il-test-kiosk-head__participant-name'>%s</span>",
+                    $this->refinery->encode()->htmlSpecialCharsAsEntities()->transform($this->user->getFullname())
+                )
+            );
             $title_content = $title_content->withProperty($pax_name_label, $pax_name_value, false);
         }