diff --git a/server/Application/Api/Model/AttachmentModel.class.php b/server/Application/Api/Model/AttachmentModel.class.php
index 32fb24799..3dac201f4 100644
--- a/server/Application/Api/Model/AttachmentModel.class.php
+++ b/server/Application/Api/Model/AttachmentModel.class.php
@@ -303,6 +303,7 @@ public function isDangerFilename($filename){
 			|| $isDangerStr($filename , ".shtm")
 			|| $isDangerStr($filename , "%")
 			|| $isDangerStr($filename , ".xml")
+			|| $isDangerStr($filename , ".xxhtml")
 		) {
 			return true;
 		}
@@ -312,4 +313,4 @@ public function isDangerFilename($filename){
 
 
 
-}
\ No newline at end of file
+}