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CVE-2018-12360

28
FAUCET Score

CVE-2018-12360 is a high-severity use-after-free vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 61 and 60 respectively. This flaw occurs when an input element is deleted during a mutation event handler triggered by focusing that element, leading to a potentially exploitable crash. With a CVSS score of 8.8, it presents a high risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. While no active exploitation or public exploit code has been identified, and community discussion remains minimal, the vulnerability's severity warrants prompt patching.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
7.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.11%
Probability of exploitation in next 30 days
EPSS Percentile
86.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0311 is in the 86th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:60.1.0-5.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:52.9.1-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:60.1.0-4.el7_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:52.9.1-1.el7_5
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-12360Critical

Mozilla: Use-after-free using focus()

Jun 26, 2018

References

access.redhat.com / errata/RHSA-2018:2112
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2113
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2251
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2252
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions RequiredThird Party Advisory
lists.debian.org / debian-lts-announce/2018/06/msg00014.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/07/msg00013.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201810-01
Third Party Advisory
security.gentoo.org / glsa/201811-13
Third Party Advisory
usn.ubuntu.com / 3705-1
Third Party Advisory
usn.ubuntu.com / 3714-1
Third Party Advisory
debian.org / security/2018/dsa-4235
Third Party Advisory
debian.org / security/2018/dsa-4244
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-15
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-16
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-17
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-18
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-19
Vendor Advisory
securityfocus.com / bid/104555
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041193
Third Party AdvisoryVDB Entry