Due to a layout change, iframe contents could have been rendered outside of its border. This could have led to user confusion or spoofing attacks. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.
[
{
"vendor": "Mozilla",
"product": "Thunderbird",
"versions": [
{
"version": "unspecified",
"lessThan": "91.8",
"status": "affected",
"versionType": "custom"
}
]
},
{
"vendor": "Mozilla",
"product": "Firefox",
"versions": [
{
"version": "unspecified",
"lessThan": "99",
"status": "affected",
"versionType": "custom"
}
]
},
{
"vendor": "Mozilla",
"product": "Firefox ESR",
"versions": [
{
"version": "unspecified",
"lessThan": "91.8",
"status": "affected",
"versionType": "custom"
}
]
}
]