That means the existing scripts are updated. Either with changed logic or documentation. They are automatically updated as long as you receive the FSL Packages via FSupdate.
If you follow the link to the PDF report, you can see the specific script and what was updated. For example:
Then in the January 11th release, page down the the "Enhanced...:" section. You will see entries like this:
14564 - (MS13-007) Vulnerability in Open Data Protocol Could Allow Denial of Service (2769327)
Category: Windows Host Assessment -> Patches Only
(CATEGORY REQUIRES CREDENTIALS)
Risk Level: High
Microsoft ID: MS13-007
Microsoft KB: 2769327
CVE is updated.
I hope that helps!