Encrypted S/MIME parts in a crafted multipart/alternative message can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 68.1 and Thunderbird < 60.9.
[
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "68.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "60.9",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]