CVE-2018-12403

MEDIUM 5.3CVE-2018-12403 · Published 28/02/2019 · updated 17/06/2026

In short

CVE-2018-12403 is a MEDIUM (CVSS 5.3) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 2.1%, higher than 81.4% of all vulnerabilities.
Fix: update to 63.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 63.0`	`63.0`

Description

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. This vulnerability affects Firefox < 63.

References

securityfocus.com/bid/105721 · Third Party Advisory
securitytracker.com/id/1041944 · Third Party Advisory
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
usn.ubuntu.com/3801-1 · Third Party Advisory
mozilla.org/security/advisories/mfsa2018-26 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 63.0

63.0

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