CVE-2005-2261

CVE-2005-2261 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Firefox before 1.0.5, Thunderbird before 1.0.5, Mozilla before 1.7.9, Netscape 8.0.2, and K-Meleon 0.9 runs XBL scripts even when Javascript has been disabled, which makes it easier for remote attackers to bypass such protection.

Frequently asked questions

What is CVE-2005-2261?
Firefox before 1.0.5, Thunderbird before 1.0.5, Mozilla before 1.7.9, Netscape 8.0.2, and K-Meleon 0.9 runs XBL scripts even when Javascript has been disabled, which makes it easier for remote attackers to bypass such protection.
How severe is CVE-2005-2261?
CVE-2005-2261 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-2261 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2261?
CVE-2005-2261 primarily affects Mozilla Firefox. In total, 55 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2261?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-2261 published?
CVE-2005-2261 was published on 2005-07-13 and last updated on 2026-06-16.

References

Affected products (55)

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