CVE-2020-12421

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-295

Affected software

VendorProductVersions
MozillaFirefox ESR>= unspecified, < 68.10
MozillaFirefox>= unspecified, < 78
MozillaThunderbird>= unspecified, < 68.10.0

References

Timeline

Published
Jul 9, 2020
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

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CVE-2020-12421: Medium severity, CVSS 6.5 | Vulnix