DrupalEd Drupal in Education.

Get release 5.2-1 here.

From the upgrade notes included in the release:

This upgrade is in response to the CCK security announcement.

While this security upgrade only affects a specific use of CCK that is not present in the DrupalEd configuration, anyone running DrupalEd is strongly advised to upgrade. A healthy dose of paranoia regarding security concerns can save you hours of time/emotional distress.