The password of user is changed without authorization EBS

We review the application for the user xx and details is password expiration:None.

But, the password is changed without authorization.

SQL> set linesize 5885;

SELECT USER_ID

, USER_NAME

, LAST_UPDATE_LOGIN

, START_DATE

, END_DATE

, LAST_LOGON_DATE

, PASSWORD_DATE

, PASSWORD_ACCESSES_LEFT

, PASSWORD_LIFESPAN_ACCESSES

, PASSWORD_LIFESPAN_DAYS

FROM APPLSYS.FND_USER

WHERE USER_NAME='XX';SQL>   2    3    4    5    6    7    8    9   10   11   12

USER_ID USER_NAME    LAST_UPDATE_LOGIN START_DAT END_DATE  LAST_LOGO PASSWORD_ PASSWORD_ACCESSES_LEFT PASSWORD_LIFESPAN_ACCESSES PASSWORD_LIFESPAN_DAYS

---------- ---------------------------------------------------------------------------------------------------- ----------------- --------- --------- --------- --------- ---------------------- -------------------------- ----------------------

3108             XX                            7892588 08-FEB-11           18-MAR-14 18-MAR-14

SQL>

You have any recommendation?