How severe is CVE-2009-3375?

CVE-2009-3375 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3375 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3375?

CVE-2009-3375 primarily affects Mozilla Firefox. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3375?

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

When was CVE-2009-3375 published?

CVE-2009-3375 was published on 2009-10-29 and last updated on 2026-06-16.

CVE-2009-3375

CVE-2009-3375 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Mozilla Firefox
Published: 2009-10-29
Last modified: 2026-06-16

Description

content/html/document/src/nsHTMLDocument.cpp in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 allows user-assisted remote attackers to bypass the Same Origin Policy and read an arbitrary content selection via the document.getSelection function.

Frequently asked questions

What is CVE-2009-3375?: content/html/document/src/nsHTMLDocument.cpp in Mozilla Firefox 3.0.x before 3.0.15 and 3.5.x before 3.5.4 allows user-assisted remote attackers to bypass the Same Origin Policy and read an arbitrary content selection via the document.getSelection function.
How severe is CVE-2009-3375?: CVE-2009-3375 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3375 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3375?: CVE-2009-3375 primarily affects Mozilla Firefox. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3375?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3375 published?: CVE-2009-3375 was published on 2009-10-29 and last updated on 2026-06-16.

References

Affected products (21)

cpe:2.3:a:mozilla:firefox:3.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0:alpha:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0:beta2:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0:beta5:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.12:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.13:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*

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