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. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2017-02/#CVE-2017-5386 Acknowledgements: 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