CVE-2018-12403

firefox: mixed content warning is not displayed when HTTPS page loads a favicon over HTTP

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Severity

Low

Red Hat Product Security

5.4

CVSS 3.0

Review impact separately from score.

Published · October 23, 2018

Updated · June 27, 2026

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.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 5.4
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE-357 · Insufficient UI Warning of Dangerous Operations