CVE-2010-3771

CVE-2010-3771 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, does not properly handle injection of an ISINDEX element into an about:blank page, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via vectors related to redirection to a chrome: URI.

Frequently asked questions

What is CVE-2010-3771?
Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, does not properly handle injection of an ISINDEX element into an about:blank page, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via vectors related to redirection to a chrome: URI.
How severe is CVE-2010-3771?
CVE-2010-3771 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2010-3771 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3771?
CVE-2010-3771 primarily affects Mozilla Firefox. In total, 173 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-3771?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-3771 published?
CVE-2010-3771 was published on 2010-12-10 and last updated on 2026-06-16.

References

Affected products (173)

More vulnerabilities in Mozilla Firefox

All CVEs affecting Mozilla Firefox →