CVE-2013-6634

CVE-2013-6634 is a medium-severity vulnerability in Google Chrome with a CVSS 2.0 base score of 6.8. 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-287.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 1% (70th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-287
• Affected product: Google Chrome
• Published: 2013-12-07
• Last modified: 2026-06-17

Description

The OneClickSigninHelper::ShowInfoBarIfPossible function in browser/ui/sync/one_click_signin_helper.cc in Google Chrome before 31.0.1650.63 uses an incorrect URL during realm validation, which allows remote attackers to conduct session fixation attacks and hijack web sessions by triggering improper sync after a 302 (aka Found) HTTP status code.

Frequently asked questions

What is CVE-2013-6634?

The OneClickSigninHelper::ShowInfoBarIfPossible function in browser/ui/sync/one_click_signin_helper.cc in Google Chrome before 31.0.1650.63 uses an incorrect URL during realm validation, which allows remote attackers to conduct session fixation attacks and hijack web sessions by triggering improper sync after a 302 (aka Found) HTTP status code.

How severe is CVE-2013-6634?

CVE-2013-6634 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-6634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6634?

CVE-2013-6634 primarily affects Google Chrome. In total, 58 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-6634?

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

When was CVE-2013-6634 published?

CVE-2013-6634 was published on 2013-12-07 and last updated on 2026-06-17.

References

• http://googlechromereleases.blogspot.com/2013/12/stable-channel-update.html
• http://lists.opensuse.org/opensuse-updates/2013-12/msg00090.html
• http://lists.opensuse.org/opensuse-updates/2013-12/msg00096.html
• http://lists.opensuse.org/opensuse-updates/2014-01/msg00042.html
• http://secunia.com/advisories/56217
• http://www.debian.org/security/2013/dsa-2811
• http://www.securitytracker.com/id/1029442
• https://code.google.com/p/chromium/issues/detail?id=307159
• https://src.chromium.org/viewvc/chrome?revision=236563&view=revision

Affected products (58)

• cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.0:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.2:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.3:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.4:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.5:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.6:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.7:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.8:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.9:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.10:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.11:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.12:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.13:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.14:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.15:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.16:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.17:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.18:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.19:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.20:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.22:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.23:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.25:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.26:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.27:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.28:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.29:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.30:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.31:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.32:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.33:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.34:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.35:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.36:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.37:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.38:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.39:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.41:*:*:*:*:*:*:*
• cpe:2.3:a:google:chrome:31.0.1650.42:*:*:*:*:*:*:*

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