diff --git a/geruecht/controller/databaseController/dbUserController.py b/geruecht/controller/databaseController/dbUserController.py
index 08f2d9d..e88940a 100644
--- a/geruecht/controller/databaseController/dbUserController.py
+++ b/geruecht/controller/databaseController/dbUserController.py
@@ -38,7 +38,10 @@ class Base:
                 retVal.initGeruechte(creditLists)
                 if workgroups:
                     retVal.workgroups = self.getWorkgroupsOfUser(retVal.id)
-            return retVal
+            if retVal.uid == username:
+                return retVal
+            else:
+                return None
         except Exception as err:
             traceback.print_exc()
             self.db.connection.rollback()
diff --git a/geruecht/controller/ldapController.py b/geruecht/controller/ldapController.py
index ca204b2..6769995 100644
--- a/geruecht/controller/ldapController.py
+++ b/geruecht/controller/ldapController.py
@@ -52,12 +52,15 @@ class LDAPController(metaclass=Singleton):
                 'dn': self.ldap.connection.response[0]['dn'],
                 'firstname': user['givenName'][0],
                 'lastname': user['sn'][0],
-                'uid': username,
+                'uid': user['uid'][0],
             }
             if user['mail']:
                 retVal['mail'] = user['mail'][0]
             debug.debug("user is {{ {} }}".format(retVal))
-            return retVal
+            if retVal['uid'] == username:
+                return retVal
+            else:
+                raise Exception()
         except:
             debug.warning("exception in get user data from ldap", exc_info=True)
             raise PermissionDenied("No User exists with this uid.")