description: When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.
problem types: Navigating to `mk:` URL scheme could load Internet Explorer
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 92, status: affected, version: unspecified, versionType: custom
}
{
product: Thunderbird
vendor: Mozilla
versions:
lessThan: 91.1, status: affected, version: unspecified, versionType: custom
lessThan: 78.14, status: affected, version: unspecified, versionType: custom
}
{
product: Firefox ESR
vendor: Mozilla
versions:
lessThan: 78.14, status: affected, version: unspecified, versionType: custom
lessThan: 91.1, status: affected, version: unspecified, versionType: custom
}
