diff --git a/backend/su.php b/backend/su.php
index 4458353..30e3274 100644
--- a/backend/su.php
+++ b/backend/su.php
@@ -16,7 +16,7 @@
 		echo json_encode($tmp);
 		exit();
 	}
-	if (!$tmp->needLogin) {
+	if (!$tmp->needLogin || ($_SESSION['uid'] == 0)) {
 		$result['loggedIn'] = true;
 		$_SESSION['uid'] = $tmp->ID;
 		$result['username'] = $tmp->name;
diff --git a/backend/userManager.php b/backend/userManager.php
index c427549..7af8f81 100644
--- a/backend/userManager.php
+++ b/backend/userManager.php
@@ -45,6 +45,8 @@
 			return $result->fetch_object()->ID;
 		}
 		static public function getRightsOnFile($uid, $file) {
+			if ($uid == 0) 
+				return FILE_FLAG_READ | FILE_FLAG_WRITE | FILE_FLAG_EXECUTE;
 			if ($uid == $file->userFK)
 				return $file->rightsUser;
 			if (userManager::userIdHasGroupId($uid, $file->groupFK))