Apple releases macOS High Sierra Supplemental Update

Apple updates High Sierra with fix for APFS Disk Utility flaw that revealed password instead of hint and Keychain vulnerability that let apps dump passwords

Take steps to protect your data if you see your password instead of your password hint for an encrypted APFS volume.

Your password might be displayed instead of your password hint if you used the Add APFS Volume command in Disk Utility to create an encrypted APFS volume, and you supplied a password hint.
Changing the password on an affected volume clears the hint but doesn’t affect the underlying encryption keys that protect the data.
Apple recommends that you take these steps to guard the security of your data.

Read more