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CVE-2018-5168

19
FAUCET Score

CVE-2018-5168 describes a vulnerability in Mozilla Firefox and Thunderbird (versions prior to 60 and 52.8 respectively) where malicious websites could bypass security checks to install lightweight themes without user interaction. This could lead to the installation of themes containing offensive or embarrassing images. The vulnerability has a CVSS score of 5.3 (Medium), indicating a low impact on integrity and no impact on confidentiality or availability, with a network attack vector and low attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
< 52.8.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.38%
Probability of exploitation in next 30 days
EPSS Percentile
82.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0238 is in the 73rd percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:52.8.0-1.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:52.8.0-2.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:52.8.0-1.el7_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:52.8.0-1.el7_5
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-5168Moderate

Mozilla: Lightweight themes can be installed without user interaction

May 9, 2018

References

access.redhat.com / errata/RHSA-2018:1414
Third Party Advisory
access.redhat.com / errata/RHSA-2018:1415
Third Party Advisory
access.redhat.com / errata/RHSA-2018:1725
Third Party Advisory
access.redhat.com / errata/RHSA-2018:1726
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
lists.debian.org / debian-lts-announce/2018/05/msg00007.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/05/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 / 3645-1
Third Party Advisory
usn.ubuntu.com / 3660-1
Third Party Advisory
debian.org / security/2018/dsa-4199
Third Party Advisory
debian.org / security/2018/dsa-4209
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-11
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-12
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-13
Vendor Advisory
securityfocus.com / bid/104136
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040896
Third Party AdvisoryVDB Entry