Advisory Published
CVE Published
Updated

CVE-2018-12398

First published: Tue Oct 23 2018(Updated: )

By using the reflected URL in some special resource URIs, such as chrome:, it is possible to inject stylesheets and bypass Content Security Policy (CSP).

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox<63
63
Mozilla Firefox<63.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
debian/firefox
133.0.3-1

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2018-12398.

  • Which software versions are affected by this vulnerability?

    This vulnerability affects Firefox versions < 63.

  • How does this vulnerability work?

    By using the reflected URL in some special resource URIs, such as chrome:, it is possible to inject stylesheets and bypass Content Security Policy (CSP).

  • What is the severity of CVE-2018-12398?

    CVE-2018-12398 has a severity rating of medium.

  • How can I fix the vulnerability in Firefox?

    To fix the vulnerability, update Firefox to version 63 or higher.

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