How severe is CVE-2009-3263?

CVE-2009-3263 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-3263?

CVE-2009-3263 primarily affects Google Chrome. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-3263?

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

When was CVE-2009-3263 published?

CVE-2009-3263 was published on 2009-09-18 and last updated on 2026-06-16.

CVE-2009-3263

CVE-2009-3263 is a medium-severity vulnerability in Google Chrome 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: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Google Chrome
Published: 2009-09-18
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in Google Chrome 2.x and 3.x before 3.0.195.21 allows remote attackers to inject arbitrary web script or HTML via a (1) RSS or (2) Atom feed, related to the rendering of the application/rss+xml content type as XML "active content."

Frequently asked questions

What is CVE-2009-3263?: Cross-site scripting (XSS) vulnerability in Google Chrome 2.x and 3.x before 3.0.195.21 allows remote attackers to inject arbitrary web script or HTML via a (1) RSS or (2) Atom feed, related to the rendering of the application/rss+xml content type as XML "active content."
How severe is CVE-2009-3263?: CVE-2009-3263 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-3263?: CVE-2009-3263 primarily affects Google Chrome. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-3263?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3263 published?: CVE-2009-3263 was published on 2009-09-18 and last updated on 2026-06-16.

References

Affected products (21)

cpe:2.3:a:google:chrome:2.0.156.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.157.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.157.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.158.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.159.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.169.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.169.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.170.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.8:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.27:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.28:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.30:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.31:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.33:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.37:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:2.0.172.38:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:3.0.182.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:3.0.190.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:3.0.193.2:beta:*:*:*:*:*:*

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