Is CVE-2018-12392 being actively exploited?

CVE-2018-12392 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-12392?

CVE-2018-12392 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2018-12392

CRITICAL · CVSS 9.8EPSS 3.4%EU EUVD

When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS score: 3.4% (89th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-4366)
Published: February 28, 2019
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-4366 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
mozilla / firefox
mozilla / thunderbird
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
redhat / enterprise linux workstation

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived

References

http://www.securityfocus.com/bid/105718(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/bid/105769(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1041944(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2018:3005(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:3006(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:3531(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:3532(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=1492823(Issue Tracking, Permissions Required, Vendor Advisory)
https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html(Mailing List, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html(Mailing List, Third Party Advisory)
https://security.gentoo.org/glsa/201811-04(Third Party Advisory)
https://security.gentoo.org/glsa/201811-13(Third Party Advisory)
https://usn.ubuntu.com/3801-1/(Third Party Advisory)
https://usn.ubuntu.com/3868-1/(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4324(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4337(Third Party Advisory)
https://www.mozilla.org/security/advisories/mfsa2018-26/(Vendor Advisory)
https://www.mozilla.org/security/advisories/mfsa2018-27/(Vendor Advisory)
https://www.mozilla.org/security/advisories/mfsa2018-28/(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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