How severe is CVE-2013-6666?

CVE-2013-6666 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2013-6666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6666?

CVE-2013-6666 primarily affects Google Chrome. In total, 106 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-6666?

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

When was CVE-2013-6666 published?

CVE-2013-6666 was published on 2014-03-05 and last updated on 2026-06-17.

CVE-2013-6666

CVE-2013-6666 is a medium-severity vulnerability in Google Chrome with a CVSS 2.0 base score of 5.8. 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 5.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Google Chrome
Published: 2014-03-05
Last modified: 2026-06-17

Description

The PepperFlashRendererHost::OnNavigate function in renderer/pepper/pepper_flash_renderer_host.cc in Google Chrome before 33.0.1750.146 does not verify that all headers are Cross-Origin Resource Sharing (CORS) simple headers before proceeding with a PPB_Flash.Navigate operation, which might allow remote attackers to bypass intended CORS restrictions via an inappropriate header.

Frequently asked questions

What is CVE-2013-6666?: The PepperFlashRendererHost::OnNavigate function in renderer/pepper/pepper_flash_renderer_host.cc in Google Chrome before 33.0.1750.146 does not verify that all headers are Cross-Origin Resource Sharing (CORS) simple headers before proceeding with a PPB_Flash.Navigate operation, which might allow remote attackers to bypass intended CORS restrictions via an inappropriate header.
How severe is CVE-2013-6666?: CVE-2013-6666 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2013-6666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6666?: CVE-2013-6666 primarily affects Google Chrome. In total, 106 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-6666?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6666 published?: CVE-2013-6666 was published on 2014-03-05 and last updated on 2026-06-17.

References

Affected products (106)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.0:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.1:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.2:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.3:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.4:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.5:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.6:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.7:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.8:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.9:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.10:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.11:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.12:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.13:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.14:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.15:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.16:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.18:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.19:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.20:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.21:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.22:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.23:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.24:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.25:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.26:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.27:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.28:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.29:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.30:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.31:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.34:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.35:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.36:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.37:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.38:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.39:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.40:*:*:*:*:*:*:*
cpe:2.3:a:google:chrome:33.0.1750.41:*:*:*:*:*:*:*

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