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    CVE-2019-11712

    POST requests made by NPAPI plugins, such as Flash, that receive a status 308 redirect response can bypass CORS requirements. This can allow an attacker to perform Cross-Site Request Forgery (CSRF) attacks. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

    Published:Jul 10, 2019
    Last Modified:Nov 25, 2025
    EPS:Jul 23, 2019
    EPSS Score:0.00376
    CVSS Score:8.8

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

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    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
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    References

    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
    http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
    http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
    http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
    https://bugzilla.mozilla.org/show_bug.cgi?id=1543804
    https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
    https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html
    https://security.gentoo.org/glsa/201908-12
    https://security.gentoo.org/glsa/201908-20
    https://www.mozilla.org/security/advisories/mfsa2019-21/
    https://www.mozilla.org/security/advisories/mfsa2019-22/
    https://www.mozilla.org/security/advisories/mfsa2019-23/
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
    http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
    http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
    http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
    http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
    https://bugzilla.mozilla.org/show_bug.cgi?id=1543804
    https://lists.debian.org/debian-lts-announce/2019/08/msg00001.html
    https://lists.debian.org/debian-lts-announce/2019/08/msg00002.html
    https://security.gentoo.org/glsa/201908-12
    https://security.gentoo.org/glsa/201908-20
    https://www.mozilla.org/security/advisories/mfsa2019-21/
    https://www.mozilla.org/security/advisories/mfsa2019-22/
    https://www.mozilla.org/security/advisories/mfsa2019-23/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High