VULNERABILITY INTELLIGENCE
CVE-2020-12421
CVSS score6.5 MEDIUM
EPSS probability1.84%
CISA KEVNot currently listed
Published2020-07-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
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 This could have caused add-ons to become out-of-date silently without notification to the user.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.
Weakness classification
- nvd@nist.gov: CWE-295
Primary references
- security@mozilla.org — Broken Link
- security@mozilla.org — Broken Link
- security@mozilla.org — Broken Link
- security@mozilla.org — Broken Link
- security@mozilla.org — Issue Tracking, Vendor Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Broken Link