Spree 0.2.0 does not properly restrict the use of a hash to provide values for a model's attributes, which allows remote attackers to set the Order state value and bypass the intended payment step via a modified URL, related to a "mass assignment" vulnerability.

The session cookie store implementation in Spree 0.2.0 uses a hardcoded config.action_controller_session hash value (aka secret key), which makes it easier for remote attackers to bypass cryptographic protection mechanisms by leveraging an application that contains this value within the config/environment.rb file.