CVE-2020-12387

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

1.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 72.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Critical. 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

2020-05-26 17:04Z6 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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
• CWE-416Use After FreeVariant

Data version

5.1

Document digest

29d4e3b4f6d2ce517b50bdff28e934705e6480d02646c485e8da09c7f600343b

• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-18/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-16/x_refsource_MISC
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-17/x_refsource_MISC
• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1545345x_refsource_MISC
• usn.ubuntu.comUSN-4373-1https://usn.ubuntu.com/4373-1/vendor-advisoryx_refsource_UBUNTU
• security.gentoo.orghttps://security.gentoo.org/glsa/202005-03x_refsource_MISC
• security.gentoo.orghttps://security.gentoo.org/glsa/202005-04x_refsource_MISC