wp-cron.php –> Password accessible

Hello,

I’m using Postie version 1.8.22, with mail refresh rate every 30 seconds.
I didn’t schedule a specific cron feature.
Today, I tried to reach https://mywebsite.myblog.com/wp-cron.php

Result was the following :

Starting mail fetch
Postie Version: 1.8.22
Wordpress Version: 4.5.9
PHP Version: 5.6.29-0+deb8u1
OS: Linux pi2 4.4.38-v7+ #938 SMP Thu Dec 15 15:22:21 GMT 2016 armv7l
POSTIE_DEBUG: On
Time: 2017-06-04 20:57:43 GMT
Error log: 
TMP dir: /tmp/
Postie is in /var/wordpress/wp-content/plugins/postie/
cURL version: 7.38.0
Cron: On
Alternate Cron: Off
wp_content_path: /var/wordpress/wp-content
MAKE SURE POP IS TURNED ON IN SETTING AT Gmail
postie_getemails: Connecting to pop.gmail.com:995 (pop3-ssl)
postie_getemails: procol: pop3-ssl
Connecting via Socket
Socket: tls://pop.gmail.com:995
Socket error: 0 - 
checkOS: Linux
socket read (1) :+OK Gpop ready for requests from 
socket write: 'STLS
'
checkOS: Linux
socket read (1) :
socket write: 'USER <strong>mygmailusename</strong>
'
checkOS: Linux
socket read (1) :+OK send PASS
socket write: 'PASS <strong>gmailpasswordwordpress</strong>
'
checkOS: Linux
socket read (1) :+OK Welcome.
postie_getemails: listing messages
socket write: 'STAT
'
checkOS: Linux
socket read (1) :+OK 0 0
pop count: Array
postie_getemails: closing connection
socket write: 'QUIT
'
checkOS: Linux
socket read (1) :+OK Farewell.
There are 0 messages to process
memory at start of email processing:1900104

As you can see, mail + password directly accessible
Did I something wrong ?
Why my cron.php is accessible like that ?