Mozilla's add-ons SDK had a world-accessible resource with an HTML injection vulnerability. If an additional vulnerability allowed this resource to be loaded as a document it could allow injecting content and script into an add-on's context. This vulnerability affects Firefox < 50.1.
{ "binaries": [ { "binary_version": "50.1.0+build2-0ubuntu0.14.04.1", "binary_name": "firefox" }, { "binary_version": "50.1.0+build2-0ubuntu0.14.04.1", "binary_name": "firefox-dev" }, { "binary_version": "50.1.0+build2-0ubuntu0.14.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "50.1.0+build2-0ubuntu0.14.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "50.1.0+build2-0ubuntu0.14.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_version": "50.1.0+build2-0ubuntu0.16.04.1", "binary_name": "firefox" }, { "binary_version": "50.1.0+build2-0ubuntu0.16.04.1", "binary_name": "firefox-dev" }, { "binary_version": "50.1.0+build2-0ubuntu0.16.04.1", "binary_name": "firefox-globalmenu" }, { "binary_version": "50.1.0+build2-0ubuntu0.16.04.1", "binary_name": "firefox-mozsymbols" }, { "binary_version": "50.1.0+build2-0ubuntu0.16.04.1", "binary_name": "firefox-testsuite" } ], "availability": "No subscription required" }