SQL injection vulnerability in the getCsvFile function in the Mage_Adminhtml_Block_Widget_Grid class in Magento Community Edition (CE) 1.9.1.0 and Enterprise Edition (EE) 1.14.1.0 allows remote administrators to execute arbitrary SQL commands via the popularity[field_expr] parameter when the popularity[from] or popularity[to] parameter is set.
http://www.securitytracker.com/id/1032194
http://magento.com/blog/technical/critical-security-advisory-remote-code-execution-rce-vulnerability
http://blog.checkpoint.com/2015/04/20/analyzing-magento-vulnerability/