How severe is CVE-2009-2472?

CVE-2009-2472 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-2472 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-2009-2472?

CVE-2009-2472 primarily affects Mozilla Firefox. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2472?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-2472 published?

CVE-2009-2472 was published on 2009-07-22 and last updated on 2026-06-16.

CVE-2009-2472

CVE-2009-2472 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 4.3. 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-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mozilla Firefox
Published: 2009-07-22
Last modified: 2026-06-16

Description

Mozilla Firefox before 3.0.12 does not always use XPCCrossOriginWrapper when required during object construction, which allows remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via a crafted document, related to a "cross origin wrapper bypass."

Frequently asked questions

What is CVE-2009-2472?: Mozilla Firefox before 3.0.12 does not always use XPCCrossOriginWrapper when required during object construction, which allows remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via a crafted document, related to a "cross origin wrapper bypass."
How severe is CVE-2009-2472?: CVE-2009-2472 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-2472 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-2009-2472?: CVE-2009-2472 primarily affects Mozilla Firefox. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2472?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2472 published?: CVE-2009-2472 was published on 2009-07-22 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:10:*:*:*:*:*:*:*
cpe:2.3:a:suse:linux_enterprise_debuginfo:10:sp2:*:*:*:*:*:*
cpe:2.3:a:suse:linux_enterprise_debuginfo:11:-:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:10:sp2:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:11:-:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:10:sp2:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:-:*:*:*:*:*:*

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