CVE-2009-1169

CVE-2009-1169 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Description

The txMozillaXSLTProcessor::TransformToDoc function in Mozilla Firefox before 3.0.8 and SeaMonkey before 1.1.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an XML file with a crafted XSLT transform.

Frequently asked questions

What is CVE-2009-1169?
The txMozillaXSLTProcessor::TransformToDoc function in Mozilla Firefox before 3.0.8 and SeaMonkey before 1.1.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an XML file with a crafted XSLT transform.
How severe is CVE-2009-1169?
CVE-2009-1169 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2009-1169 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1169?
CVE-2009-1169 primarily affects Mozilla Firefox. In total, 99 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1169?
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-2009-1169 published?
CVE-2009-1169 was published on 2009-03-27 and last updated on 2026-06-16.

References

Affected products (99)

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