CVE-2011-2371

CVE-2011-2371 is a critical-severity vulnerability in Mozilla Seamonkey with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 76% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Description

Integer overflow in the Array.reduceRight method in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, Thunderbird before 3.1.11, and SeaMonkey through 2.0.14 allows remote attackers to execute arbitrary code via vectors involving a long JavaScript Array object.

Frequently asked questions

What is CVE-2011-2371?
Integer overflow in the Array.reduceRight method in Mozilla Firefox before 3.6.18 and 4.x through 4.0.1, Thunderbird before 3.1.11, and SeaMonkey through 2.0.14 allows remote attackers to execute arbitrary code via vectors involving a long JavaScript Array object.
How severe is CVE-2011-2371?
CVE-2011-2371 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-2371 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 76% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2371?
CVE-2011-2371 primarily affects Mozilla Seamonkey. In total, 265 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2371?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-2371 published?
CVE-2011-2371 was published on 2011-06-30 and last updated on 2026-06-16.

References

Affected products (265)

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