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CVE-2009-3371

30
FAUCET Score

CVE-2009-3371 is a critical use-after-free vulnerability in Mozilla Firefox 3.5.x versions prior to 3.5.4. This flaw allows remote attackers to trigger a denial of service or potentially execute arbitrary code by recursively creating JavaScript web-workers. With a CVSS score of 10.0, it represents a severe risk, requiring no authentication and having low attack complexity. Despite its high 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
3.5.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*
3.5.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*
3.5.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*
3.5.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:3.5.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
7.17%
Probability of exploitation in next 30 days
EPSS Percentile
93.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0717 is in the 89th percentile among its peer group of 51,551 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

Patch Available

Vendor Patches (1)

mozillapatch availablevia nvd_reference
View patch

References

bugzilla.mozilla.org / show_bug.cgi
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6464
sunsolve.sun.com / search/document.do
mandriva.com / security/advisories
mozilla.org / security/announce/2009/mfsa2009-54.html
ExploitPatch
vupen.com / english/advisories/2009/3334