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CVE-2013-6671

37
FAUCET Score

CVE-2013-6671 is a critical arbitrary code execution vulnerability affecting Mozilla Firefox, Firefox ESR, Thunderbird, and SeaMonkey. It stems from a flaw in the nsGfxScrollFrameInner::IsLTR function, allowing remote attackers to execute code through specially crafted JavaScript involving ordered list elements. With a CVSS score of 9.8 (CRITICAL) and a FAUCET Risk Score of 96/100, this vulnerability presents a severe risk, as it can be exploited remotely with low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV: No) and no public exploit code (Metasploit, Nuclei, ExploitDB: None), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 26.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
>= 24.0, < 24.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 2.23CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
< 24.2CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
11.08%
Probability of exploitation in next 30 days
EPSS Percentile
95.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1108 is in the 91st percentile among its peer group of 36,835 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)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:24.2.0-1.el5_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:24.2.0-2.el5_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:24.2.0-1.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:24.2.0-1.el6_5
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2013-6671Critical

Mozilla: Segmentation violation when replacing ordered list elements (MFSA 2013-111)

Dec 10, 2013

References

lists.fedoraproject.org / pipermail/package-announce/2013-December/123437.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2013-December/124108.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2013-December/124257.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2014-January/125470.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2013-12/msg00010.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00085.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00086.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00087.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00119.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00120.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2013-12/msg00121.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2014-01/msg00002.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2013-1812.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingVendor Advisory
security.gentoo.org / glsa/201504-01
Third Party Advisory
mozilla.org / security/announce/2013/mfsa2013-111.html
Vendor Advisory
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory
securityfocus.com / bid/64212
Third Party AdvisoryVDB Entry
securitytracker.com / id/1029470
Third Party AdvisoryVDB Entry
securitytracker.com / id/1029476
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2052-1
Third Party Advisory
ubuntu.com / usn/USN-2053-1
Third Party Advisory