Mozilla Firefox before 27.0 and SeaMonkey before 2.24 allow remote attackers to bypass the Same Origin Policy and obtain sensitive information by using an IFRAME element in conjunction with certain timing measurements involving the document.caretPositionFromPoint and document.elementFromPoint functions.
Improper Restriction of Rendered UI Layers or Frames The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain.