Spree 0.11.x before 0.11.2 and 0.30.x before 0.30.0 exchanges data using JavaScript Object Notation (JSON) without a mechanism for validating requests, which allows remote attackers to obtain sensitive information via vectors involving (1) admin/products.json, (2) admin/users.json, or (3) admin/overview/get_report_data, related to a “JSON hijacking” issue.
spreecommerce.com/blog/2010/11/02/json-hijacking-vulnerability/
spreecommerce.com/blog/2010/11/09/spree-0-30-0-released/
twitter.com/conviso/statuses/29555076248
www.conviso.com.br/json-hijacking-vulnerability/
www.conviso.com.br/security-advisory-spree-e-commerce-json-v-0-11x/
www.securityfocus.com/archive/1/514674/100/0/threaded
github.com/railsdog/spree/commit/19944bd999c310d9b10d16a41f48ebac97dc4fac
github.com/railsdog/spree/commit/d881b2bb610ea33e2364ff16feb8e702dfeda135