The point moderation form in the Userpoints 4.7.x before 4.7.x-2.3, 5.x-2 before 5.x-2.16, and 5.x-3 before 5.x-3.3 module for Drupal does not follow Drupal's Forms API submission model, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks and manipulate points.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-0571)