If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23953.json"
[
{
"events": [
{
"introduced": "0"
},
{
"fixed": "85.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "78.7"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "78.7"
}
]
}
]