Advisory Published
CVE Published
Updated

CVE-2018-12403

First published: Tue Oct 23 2018(Updated: )

If a site is loaded over a HTTPS connection but loads a favicon resource over HTTP, the mixed content warning is not displayed to users.

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
132.0.2-1

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2018-12403?

    CVE-2018-12403 is a vulnerability that affects Firefox versions prior to 63.

  • How does CVE-2018-12403 affect web browsers?

    CVE-2018-12403 allows web browsers to load a favicon resource over HTTP when the site is loaded over a secure HTTPS connection.

  • What is the severity of CVE-2018-12403?

    CVE-2018-12403 has a severity value of 5.3, which is classified as medium.

  • How can I fix CVE-2018-12403?

    To fix CVE-2018-12403, users should update their Firefox browser to version 63 or higher.

  • Where can I find more information about CVE-2018-12403?

    More information about CVE-2018-12403 can be found on the Mozilla website and in the CVE database.

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