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CVE-2012-4210

30
FAUCET Score

CVE-2012-4210 describes a critical vulnerability in Mozilla Firefox versions prior to 17.0 and Firefox ESR 10.x before 10.0.11. This flaw in the Style Inspector allowed user-assisted remote attackers to execute arbitrary JavaScript with chrome privileges by manipulating HTML and CSS. With a CVSS score of 9.3, this vulnerability is highly severe, indicating a network-based attack with medium complexity that could lead to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 16.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox: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
3.53%
Probability of exploitation in next 30 days
EPSS Percentile
88.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0353 is in the 48th percentile among its peer group of 8,918 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 (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:10.0.11-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:10.0.11-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:10.0.11-1.el6_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:10.0.11-1.el6_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2012-4210Critical

Mozilla: CSS and HTML injection through Style Inspector (MFSA 2012-104)

Nov 20, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-11/msg00021.html
lists.opensuse.org / opensuse-security-announce/2013-01/msg00022.html
lists.opensuse.org / opensuse-updates/2012-11/msg00090.html
lists.opensuse.org / opensuse-updates/2012-11/msg00093.html
rhn.redhat.com / errata/RHSA-2012-1482.html
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/51359
secunia.com / advisories/51369
secunia.com / advisories/51434
secunia.com / advisories/51439
exchange.xforce.ibmcloud.com / vulnerabilities/80182
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16833
mandriva.com / security/advisories
mozilla.org / security/announce/2012/mfsa2012-104.html
Vendor Advisory
palemoon.org / releasenotes-ng.shtml
securityfocus.com / bid/56646
ubuntu.com / usn/USN-1638-1
ubuntu.com / usn/USN-1638-2
ubuntu.com / usn/USN-1638-3