The Node Reference module in Content Construction Kit (CCK) module 6.x before 6.x-2.7 for Drupal does not perform access checks for the source field in the backend URL for the autocomplete widget, which allows remote attackers to discover titles and IDs of controlled nodes.
drupal.org/node/829566
lists.fedoraproject.org/pipermail/package-announce/2010-June/043100.html
lists.fedoraproject.org/pipermail/package-announce/2010-June/043172.html
lists.fedoraproject.org/pipermail/package-announce/2010-June/043191.html
osvdb.org/65615
secunia.com/advisories/40243
secunia.com/advisories/40318
www.vupen.com/english/advisories/2010/1546
exchange.xforce.ibmcloud.com/vulnerabilities/59515