WebExtension scripts can use the data: protocol to affect pages loaded by other web extensions using this protocol, leading to potential data disclosure or privilege escalation in affected extensions.
Name: the Mozilla project
Upstream: Muneaki Nishimura
This issue has been addressed in the following products:
Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Via RHSA-2017:0190 https://rhn.redhat.com/errata/RHSA-2017-0190.html