WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission. This vulnerability affects Firefox < 60.
{ "binaries": [ { "binary_name": "firefox", "binary_version": "60.0+build2-0ubuntu0.14.04.1" }, { "binary_name": "firefox-dev", "binary_version": "60.0+build2-0ubuntu0.14.04.1" }, { "binary_name": "firefox-globalmenu", "binary_version": "60.0+build2-0ubuntu0.14.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "60.0+build2-0ubuntu0.14.04.1" }, { "binary_name": "firefox-testsuite", "binary_version": "60.0+build2-0ubuntu0.14.04.1" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_name": "firefox", "binary_version": "60.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-dev", "binary_version": "60.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-globalmenu", "binary_version": "60.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "60.0+build2-0ubuntu0.16.04.1" }, { "binary_name": "firefox-testsuite", "binary_version": "60.0+build2-0ubuntu0.16.04.1" } ], "availability": "No subscription required" }
{ "binaries": [ { "binary_name": "firefox", "binary_version": "60.0+build2-0ubuntu1" }, { "binary_name": "firefox-dev", "binary_version": "60.0+build2-0ubuntu1" }, { "binary_name": "firefox-globalmenu", "binary_version": "60.0+build2-0ubuntu1" }, { "binary_name": "firefox-mozsymbols", "binary_version": "60.0+build2-0ubuntu1" }, { "binary_name": "firefox-testsuite", "binary_version": "60.0+build2-0ubuntu1" } ], "availability": "No subscription required" }