Why does utility "plesk repair fs" mark files as suspicious?

Question

Why does the utility "plesk repair fs" mark files as suspicious?

# plesk repair fs -v
Checking Linux system files ......................................... [OK]
Checking virtual hosts' file system
There are files or directories with suspicious permissions in the
root directory of the domain 'example.com' ........................ [WARNING]
- /var/www/vhosts/example.com/httpdocs/directory/file1
- /var/www/vhosts/example.com/httpdocs/directory/file2
- /var/www/vhosts/example.com/httpdocs/directory/file3
Error messages: 0; Warnings: 1; Errors resolved: 0

Answer

The following permissions are set for the files:

# ls -la /var/www/vhosts/example.com/httpdocs/directory
total 8
drwxr-xr-x 2 root root 4096 Mar 18 07:51 .
drwxr-x--- 9 johndoe psaserv 4096 Mar 18 07:50 ..
-rwxrwxrwx 1 johndoe psacln 0 Mar 18 07:50 file1
-rwxrwxrwx 1 johndoe psacln 0 Mar 18 07:50 file2
-rwxrwxrwx 1 johndoe psacln 0 Mar 18 07:51 file3

Permissions 777 are not recommended and marked as suspicious by the utility plesk repair fs because these permissions allow anyone to do anything with the files which is considered as a possible security breach.