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CVE-2011-3663

17
FAUCET Score

CVE-2011-3663 describes a vulnerability in Mozilla Firefox 4.x-8.0, Thunderbird 5.0-8.0, and SeaMonkey before 2.6, allowing remote attackers to capture keystrokes on a webpage even with JavaScript disabled, through SVG animation accessKey events. This vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity, resulting in partial confidentiality impact (keystroke capture). There is no evidence of active exploitation, nor is exploit code publicly available in Metasploit, Nuclei, or ExploitDB, and it has received negligible community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta1:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta10:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta11:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
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
2.08%
Probability of exploitation in next 30 days
EPSS Percentile
79.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0208 is in the 66th percentile among its peer group of 19,955 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

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-3663Critical

Mozilla: Multiple security flaws fixed in v3.6.25 (Mac) and v9

Dec 20, 2011

References

lists.opensuse.org / opensuse-security-announce/2012-01/msg00001.html
lists.opensuse.org / opensuse-security-announce/2012-01/msg00009.html
osvdb.org / 77954
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/47302
Vendor Advisory
secunia.com / advisories/47334
Vendor Advisory
secunia.com / advisories/49055
exchange.xforce.ibmcloud.com / vulnerabilities/71911
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14739
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-56.html
Vendor Advisory
securitytracker.com / id
securitytracker.com / id
securitytracker.com / id