A website could have obscured the fullscreen notification by using a dropdown select input element. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.
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"binary_version": "123.0+build3-0ubuntu0.20.04.1",
"binary_name": "firefox-mozsymbols"
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"availability": "No subscription required"
}{
"binaries": [
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"binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1",
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"binary_name": "thunderbird-gnome-support"
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"binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1",
"binary_name": "thunderbird-mozsymbols"
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"binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1",
"binary_name": "xul-ext-calendar-timezones"
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"binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1",
"binary_name": "xul-ext-gdata-provider"
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"binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1",
"binary_name": "xul-ext-lightning"
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"availability": "No subscription required"
}{
"binaries": [
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"binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1",
"binary_name": "thunderbird"
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"binary_name": "thunderbird-dev"
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"binary_name": "thunderbird-gnome-support"
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"binary_name": "thunderbird-mozsymbols"
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"binary_name": "xul-ext-calendar-timezones"
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"binary_name": "xul-ext-gdata-provider"
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"binary_name": "xul-ext-lightning"
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"availability": "No subscription required"
}