Through a series of API calls and redirects, an attacker-controlled alert dialog could have been displayed on another website (with the victim website's URL shown). This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "123.0+build3-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "123.0+build3-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-geckodriver",
            "binary_version": "123.0+build3-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "123.0+build3-0ubuntu0.20.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:115.8.1+build1-0ubuntu0.20.04.1"
        }
    ]
}{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "thunderbird",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "thunderbird-dev",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "thunderbird-gnome-support",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "thunderbird-mozsymbols",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "xul-ext-calendar-timezones",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "xul-ext-gdata-provider",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        },
        {
            "binary_name": "xul-ext-lightning",
            "binary_version": "1:115.8.1+build1-0ubuntu0.22.04.1"
        }
    ]
}