The auto-format feature in the Request_Curl class in FuelPHP 1.1 through 1.7.1 allows remote attackers to execute arbitrary code via a crafted response.
Improper Control of Generation of Code The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.