Cross-site request forgery (CSRF) vulnerability in the Fivestar module 5.x-1.x before 5.x-1.14 and 6.x-1.x before 6.x-1.14, a module for Drupal, allows remote attackers to hijack the authentication of arbitrary users for requests that cast votes.

The Fivestar module 6.x-1.x before 6.x-1.20 for Drupal does not properly validate voting data, which allows remote attackers to manipulate voting averages via a negative value in the vote parameter.