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CVE-2018-12390

31
FAUCET Score

CVE-2018-12390 is a critical memory safety vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 63, 60.3, and 60.3 respectively. It involves memory corruption bugs that could potentially lead to arbitrary code execution. With a CVSS score of 9.8, this vulnerability is considered critical due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 60.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 63.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.21%
Probability of exploitation in next 30 days
EPSS Percentile
86.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0321 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:60.3.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:60.3.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:60.3.0-1.el7_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:60.3.0-1.el7_5
View patch

Vendor Advisories (1)

redhatCVE-2018-12390Critical

Mozilla: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3

Oct 23, 2018

References

access.redhat.com / errata/RHSA-2018:3005
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3006
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3531
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3532
Third Party Advisory
bugzilla.mozilla.org / buglist.cgi
Issue TrackingPatchVendor Advisory
lists.debian.org / debian-lts-announce/2018/11/msg00008.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/11/msg00011.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201811-04
Third Party Advisory
security.gentoo.org / glsa/201811-13
Third Party Advisory
usn.ubuntu.com / 3801-1
Third Party Advisory
usn.ubuntu.com / 3868-1
Third Party Advisory
debian.org / security/2018/dsa-4324
Third Party Advisory
debian.org / security/2018/dsa-4337
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-26
PatchVendor Advisory
mozilla.org / security/advisories/mfsa2018-27
PatchVendor Advisory
mozilla.org / security/advisories/mfsa2018-28
PatchVendor Advisory
securityfocus.com / bid/105718
Third Party AdvisoryVDB Entry
securityfocus.com / bid/105769
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041944
Third Party AdvisoryVDB Entry