The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability affects Firefox < 135 and Thunderbird < 135.
{ "binaries": [ { "binary_version": "135.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox" }, { "binary_version": "135.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-dev" }, { "binary_version": "135.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "135.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-mozsymbols" } ], "availability": "No subscription required" }