In Firefox < 51, special about: pages used by web content, such as RSS feeds, can load privileged about: pages in an iframe. If a content-injection bug were found in one of those pages this could allow for potential privilege escalation.
In Firefox < 51, special about: pages used by web content, such as RSS feeds, can load privileged about: pages in an iframe. If a content-injection bug were found in one of those pages this could allow for potential privilege escalation.
https://www.mozilla.org/en-US/security/advisories/mfsa2017-01/#CVE-2017-5391 https://bugzilla.mozilla.org/show_bug.cgi?id=1309310
Vulmon