CVE-2021-29974

MediumCVSS 4.3/10Last modified Jun 17, 2026

Description

When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected software

No affected versions have been published.

Timeline

Published: Aug 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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