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CVE-2013-6674

30
FAUCET Score

CVE-2013-6674 is a cross-site scripting (XSS) vulnerability affecting Mozilla Thunderbird 17.x, Thunderbird ESR 17.x, and SeaMonkey before 2.20. It allows user-assisted remote attackers to inject arbitrary web script or HTML via a specially crafted email containing a data: URL within an IFRAME element. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and low impact, primarily affecting integrity. While not listed in CISA's KEV catalog, an exploit for a related input validation bypass exists on ExploitDB, and its EPSS score suggests a higher-than-average probability of exploitation. There is no evidence of active exploitation, nor significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
<= 2.20CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:*:beta3:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.70%
Probability of exploitation in next 30 days
EPSS Percentile
94.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-31223 · Jan 27, 2014
This CVE's current EPSS score of 0.0770 is in the 93rd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (3)

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: thunderbird-0:24.2.0-1.el6_5
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2013-6674Moderate

Mozilla: Script execution in HTML mail replies (MFSA 2014-14)

Feb 6, 2014

References

osvdb.org / 102566
packetstormsecurity.com / files/124965/Mozilla-Thunderbird-Filter-Bypass.html
Exploit
bugzilla.mozilla.org / show_bug.cgi
seclists.org / fulldisclosure/2014/Jan/182
Exploit
kb.cert.org / vuls/id/863369
Third Party AdvisoryUS Government Resource
mozilla.org / security/announce/2014/mfsa2014-14.html
Vendor Advisory
securitytracker.com / id/1029773
securitytracker.com / id/1029774
ubuntu.com / usn/USN-2119-1