CVE-2020-12421

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.84% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 77.1% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-07-09 14:39Z6 YR AGO

Last updated

2024-08-04 11:56Z2 YR AGO

Reserved

2020-04-28

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-295Improper Certificate ValidationBase
• CWE-296Improper Following of a Certificate's Chain of TrustBase

Data version

5.1

Document digest

33e3e37db329b83503653ea09d9980a66d10ae296aea02bbdcee1fef5f154c43

• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-24/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-26/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-25/x_refsource_MISC
• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1308251x_refsource_MISC
• lists.opensuse.orgopenSUSE-SU-2020:0967http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2020:0982http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2020:0983http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2020:1017http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.htmlvendor-advisoryx_refsource_SUSE
• usn.ubuntu.comUSN-4421-1https://usn.ubuntu.com/4421-1/vendor-advisoryx_refsource_UBUNTU
• security.gentoo.orgGLSA-202007-09https://security.gentoo.org/glsa/202007-09vendor-advisoryx_refsource_GENTOO
• security.gentoo.orgGLSA-202007-10https://security.gentoo.org/glsa/202007-10vendor-advisoryx_refsource_GENTOO