The gnome-shell plugin 3.4.1 in GNOME allows remote attackers to force the download and installation of arbitrary extensions from extensions.gnome.org via a crafted web page.
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.