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    CVE-2012-4210

    The Style Inspector in Mozilla Firefox before 17.0 and Firefox ESR 10.x before 10.0.11 does not properly restrict the context of HTML markup and Cascading Style Sheets (CSS) token sequences, which allows user-assisted remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted stylesheet.

    Published:Nov 20, 2012
    Last Modified:Apr 11, 2025
    EPS:Nov 21, 2012
    EPSS Score:0.03834
    CVSS Score:9.3

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    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…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html
    http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html
    http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html
    http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html
    http://rhn.redhat.com/errata/RHSA-2012-1482.html
    http://secunia.com/advisories/51359
    http://secunia.com/advisories/51369
    http://secunia.com/advisories/51434
    http://secunia.com/advisories/51439
    http://www.mandriva.com/security/advisories?name=MDVSA-2012:173
    http://www.mozilla.org/security/announce/2012/mfsa2012-104.html
    http://www.palemoon.org/releasenotes-ng.shtml
    http://www.securityfocus.com/bid/56646
    http://www.ubuntu.com/usn/USN-1638-1
    http://www.ubuntu.com/usn/USN-1638-2
    http://www.ubuntu.com/usn/USN-1638-3
    https://bugzilla.mozilla.org/show_bug.cgi?id=796866
    https://exchange.xforce.ibmcloud.com/vulnerabilities/80182
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16833
    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00021.html
    http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html
    http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html
    http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html
    http://rhn.redhat.com/errata/RHSA-2012-1482.html
    http://secunia.com/advisories/51359
    http://secunia.com/advisories/51369
    http://secunia.com/advisories/51434
    http://secunia.com/advisories/51439
    http://www.mandriva.com/security/advisories?name=MDVSA-2012:173
    http://www.mozilla.org/security/announce/2012/mfsa2012-104.html
    http://www.palemoon.org/releasenotes-ng.shtml
    http://www.securityfocus.com/bid/56646
    http://www.ubuntu.com/usn/USN-1638-1
    http://www.ubuntu.com/usn/USN-1638-2
    http://www.ubuntu.com/usn/USN-1638-3
    https://bugzilla.mozilla.org/show_bug.cgi?id=796866
    https://exchange.xforce.ibmcloud.com/vulnerabilities/80182
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16833

    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