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CVE-2012-3993

72
FAUCET Score

CVE-2012-3993 is a critical vulnerability affecting Mozilla Firefox, Thunderbird, and SeaMonkey versions prior to 16.0, 10.0.8, and 2.13 respectively. It stems from improper interaction between the Chrome Object Wrapper (COW) and InstallTrigger method failures, allowing remote attackers to execute arbitrary JavaScript with chrome privileges. With a CVSS score of 9.3, this vulnerability is highly severe, requiring medium attack complexity but enabling complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog, a Metasploit module exists for exploitation, indicating readily available exploit code, though community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
10.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:10.0:*:*:*:*:*:*:*
10.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:10.0.1:*:*:*:*:*:*:*
10.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:10.0.2:*:*:*:*:*:*:*
10.0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:10.0.3:*:*:*:*:*:*:*
10.0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:10.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
42.61%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Firefox 5.0 - 15.0.1 __exposedProps__ XCS Code Execution · Aug 6, 2013
ExploitDB: EDB-30474 · Aug 6, 2013
This CVE's current EPSS score of 0.4261 is in the 97th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:10.0.8-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:10.0.8-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:10.0.8-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:10.0.8-1.el6_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:10.0.8-1.el6_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:10.0.8-1.el6_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2012-3993Moderate

Mozilla: Chrome Object Wrapper (COW) does not disallow acces to privileged functions or properties (MFSA 2012-83)

Oct 9, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-10/msg00010.html
Mailing ListThird Party Advisory
osvdb.org / 86111
Broken Link
rhn.redhat.com / errata/RHSA-2012-1351.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingVendor Advisory
secunia.com / advisories/50856
Third Party Advisory
secunia.com / advisories/50892
Third Party Advisory
secunia.com / advisories/50904
Third Party Advisory
secunia.com / advisories/50935
Third Party Advisory
secunia.com / advisories/50936
Third Party Advisory
secunia.com / advisories/50984
Third Party Advisory
secunia.com / advisories/55318
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/79153
Third Party AdvisoryVDB Entry
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16718
Third Party Advisory
mandriva.com / security/advisories
Third Party Advisory
mozilla.org / security/announce/2012/mfsa2012-83.html
Vendor Advisory
securityfocus.com / bid/56119
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-1611-1
Third Party Advisory