My self Abdulwahab, I want to Alert You that Your website is Facing a serious Problem Called : Username Enumeration This Problem is on nextcloud.com/wp-admin
We Use wpscan to get username
and the username is "frank" After getting username a user can Bruteforce it Using Wpscan and get access to admin panel and upload shell and also get all sub_domain Means Full Server is Hacked!
To Fix this use Wordpress Login Attemptizer
Thanks, ABDULWAHAB, Independent Cyber Security Researcher,