Session fixation vulnerability in the Ubercart module 6.x-2.x before 6.x-2.13 and 7.x-3.x before 7.x-3.6 for Drupal, when the "Log in new customers after checkout" option is enabled, allows remote attackers to hijack web sessions by leveraging knowledge of the original session ID.

Cross-site request forgery (CSRF) vulnerability in the order-management functionality in the Ubercart module 5.x before 5.x-1.9 and 6.x before 6.x-2.1 for Drupal allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.

The PayPal Website Payments Standard functionality in the Ubercart module 5.x before 5.x-1.9 and 6.x before 6.x-2.1 for Drupal does not properly validate orders, which allows remote attackers to trigger unspecified "duplicate actions" via unknown vectors.

Unspecified vulnerability in the PayPal Website Payments Standard functionality in the Ubercart module 5.x before 5.x-1.9 and 6.x before 6.x-2.1 for Drupal, when a custom checkout completion message is enabled, allows attackers to obtain sensitive information via unknown vectors.