CVE-2011-0054

CVE-2011-0054 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 5% (90th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Mozilla Firefox
• Published: 2011-03-02
• Last modified: 2026-06-16

Description

Buffer overflow in the JavaScript engine in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, might allow remote attackers to execute arbitrary code via vectors involving non-local JavaScript variables, aka an "upvarMap" issue.

Frequently asked questions

What is CVE-2011-0054?

Buffer overflow in the JavaScript engine in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, might allow remote attackers to execute arbitrary code via vectors involving non-local JavaScript variables, aka an "upvarMap" issue.

How severe is CVE-2011-0054?

CVE-2011-0054 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2011-0054 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0054?

CVE-2011-0054 primarily affects Mozilla Firefox. In total, 157 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0054?

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-2011-0054 published?

CVE-2011-0054 was published on 2011-03-02 and last updated on 2026-06-16.

References

• http://downloads.avaya.com/css/P8/documents/100133195
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:041
• http://www.mozilla.org/security/announce/2011/mfsa2011-04.html
• http://www.securityfocus.com/bid/46648
• https://bugzilla.mozilla.org/show_bug.cgi?id=615657
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14018

Affected products (157)

• cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.11:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.12:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.6.13:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:alpha:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:beta:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.11:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.12:*:*:*:*:*:*:*

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