Unspecified vulnerability in Drupal 5.x before 5.17 and 6.x before 6.11, as used in vbDrupal before 5.17.0, allows user-assisted remote attackers to obtain sensitive information by tricking victims into visiting the front page of the site with a crafted URL and causing form data to be sent to an attacker-controlled site, possibly related to multiple / (slash) characters that are not properly handled by includes/bootstrap.inc, as demonstrated using the search box. NOTE: this vulnerability can be leveraged to conduct cross-site request forgery (CSRF) attacks.
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg00133.html
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg00108.html
http://www.vupen.com/english/advisories/2009/1216
http://www.vbdrupal.org/forum/showthread.php?p=9953#post9953
http://www.debian.org/security/2009/dsa-1792
http://secunia.com/advisories/34980
http://secunia.com/advisories/34950
http://secunia.com/advisories/34948
http://drupal.org/files/sa-core-2009-005/SA-CORE-2009-005-5.16.patch