The Sidebar gadget in ITN News Gadget (aka ITN Hub Gadget) 1.06 for Windows Vista, and possibly other versions before 1.23, allows remote web servers or man-in-the-middle attackers to execute arbitrary commands via script in a short_title response.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.