CVE-2011-3655

CVE-2011-3655 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. 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-94.

Key facts

Description

Mozilla Firefox 4.x through 7.0 and Thunderbird 5.0 through 7.0 perform access control without checking for use of the NoWaiverWrapper wrapper, which allows remote attackers to gain privileges via a crafted web site.

Frequently asked questions

What is CVE-2011-3655?
Mozilla Firefox 4.x through 7.0 and Thunderbird 5.0 through 7.0 perform access control without checking for use of the NoWaiverWrapper wrapper, which allows remote attackers to gain privileges via a crafted web site.
How severe is CVE-2011-3655?
CVE-2011-3655 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-3655 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3655?
CVE-2011-3655 primarily affects Mozilla Firefox. In total, 25 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3655?
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-2011-3655 published?
CVE-2011-3655 was published on 2011-11-09 and last updated on 2026-06-16.

References

Affected products (25)

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