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CVE-2011-3661

24
FAUCET Score

CVE-2011-3661 describes a denial-of-service vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey, stemming from an issue in the YARR component when processing crafted JavaScript. This vulnerability carries a CVSS score of 7.5, indicating a high severity, as it can be exploited remotely with low complexity to cause application crashes and potentially arbitrary code execution, impacting 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 surrounding this CVE.

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

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.76%
Probability of exploitation in next 30 days
EPSS Percentile
88.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0376 is in the 80th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-3661Critical

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
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/47302
secunia.com / advisories/47334
secunia.com / advisories/49055
exchange.xforce.ibmcloud.com / vulnerabilities/71909
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14424
mandriva.com / security/advisories
mozilla.org / security/announce/2011/mfsa2011-54.html
Vendor Advisory
securitytracker.com / id
securitytracker.com / id
securitytracker.com / id