Even when an iframe was sandboxed with <code>allow-top-navigation-by-user-activation</code>, if it received a redirect header to an external protocol the browser would process the redirect and prompt the user as appropriate. This vulnerability affects Firefox < 102.
{ "availability": "No subscription required", "binaries": [ { "binary_version": "102.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox" }, { "binary_version": "102.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-dev" }, { "binary_version": "102.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "102.0+build2-0ubuntu0.18.04.1", "binary_name": "firefox-mozsymbols" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_version": "102.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox" }, { "binary_version": "102.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-dev" }, { "binary_version": "102.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "102.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-mozsymbols" } ] }