HTML tags received from the Pocket server will be processed without sanitization and any JavaScript code executed will be run in the "about:pocket-saved" (unprivileged) page, giving it access to Pocket's messaging API through HTML injection. This vulnerability affects Firefox ESR < 45.6 and Firefox < 50.1.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "50.1.0+build2-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "50.1.0+build2-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "50.1.0+build2-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "50.1.0+build2-0ubuntu0.14.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "50.1.0+build2-0ubuntu0.14.04.1"
        }
    ]
}
          {
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "firefox",
            "binary_version": "50.1.0+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-dev",
            "binary_version": "50.1.0+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-globalmenu",
            "binary_version": "50.1.0+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-mozsymbols",
            "binary_version": "50.1.0+build2-0ubuntu0.16.04.1"
        },
        {
            "binary_name": "firefox-testsuite",
            "binary_version": "50.1.0+build2-0ubuntu0.16.04.1"
        }
    ]
}