medium
6.1
CWE
254
Advisory Published
CVE Published
Updated

CVE-2016-9895

First published: Tue Dec 13 2016(Updated: )

Event handlers on "marquee" elements were executed despite a strict Content Security Policy (CSP) that disallowed inline JavaScript. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

Credit: security@mozilla.org

Affected SoftwareAffected VersionHow to fix
debian/firefox
118.0.2-1
debian/firefox-esr
91.12.0esr-1~deb10u1
115.3.1esr-1~deb10u1
102.15.0esr-1~deb11u1
115.3.1esr-1~deb11u1
102.15.1esr-1~deb12u1
115.3.0esr-1~deb12u1
115.3.0esr-1
Thunderbird<45.6
45.6
Debian=9.0
Red Hat Enterprise Linux=5.0
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux Desktop=5.0
Red Hat Enterprise Linux Desktop=6.0
Red Hat Enterprise Linux Desktop=7.0
Red Hat Enterprise Linux Server=5.0
Red Hat Enterprise Linux Server=6.0
Red Hat Enterprise Linux Server=7.0
Red Hat Enterprise Linux Server=7.3
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.3
Red Hat Enterprise Linux Server=7.4
Red Hat Enterprise Linux Server=7.5
Red Hat Enterprise Linux Workstation=5.0
Red Hat Enterprise Linux Workstation=6.0
Red Hat Enterprise Linux Workstation=7.0
Thunderbird<45.6.0
Firefox<50.1
Firefox ESR<45.6.0
Firefox<50.1
50.1
Firefox ESR<45.6
45.6

Remedy

https://bugzilla.mozilla.org/show_bug.cgi?id=1312272

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2016-9895?

    CVE-2016-9895 is a moderate severity vulnerability affecting certain versions of Firefox, Firefox ESR, and Thunderbird.

  • Which versions are affected by CVE-2016-9895?

    CVE-2016-9895 affects Firefox versions below 50.1, Firefox ESR versions below 45.6, and Thunderbird versions below 45.6.

  • How do I fix CVE-2016-9895?

    To fix CVE-2016-9895, upgrade Firefox to version 50.1 or later, Firefox ESR to version 45.6 or later, or Thunderbird to version 45.6 or later.

  • Is there a workaround for CVE-2016-9895?

    There is no documented workaround for CVE-2016-9895; updating to the latest versions is recommended.

  • What impact does CVE-2016-9895 have on users?

    CVE-2016-9895 allows execution of event handlers on marquee elements despite a strict Content Security Policy, potentially leading to security risks.

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