How severe is CVE-2013-1639?

CVE-2013-1639 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2013-1639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-1639?

CVE-2013-1639 primarily affects Opera Opera Browser. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1639?

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

When was CVE-2013-1639 published?

CVE-2013-1639 was published on 2013-02-08 and last updated on 2026-06-16.

CVE-2013-1639

CVE-2013-1639 is a medium-severity vulnerability in Opera Opera Browser 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-352.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Opera Opera Browser
Published: 2013-02-08
Last modified: 2026-06-16

Description

Opera before 12.13 does not send CORS preflight requests in all required cases, which allows remote attackers to bypass a CSRF protection mechanism via a crafted web site that triggers a CORS request.

Frequently asked questions

What is CVE-2013-1639?: Opera before 12.13 does not send CORS preflight requests in all required cases, which allows remote attackers to bypass a CSRF protection mechanism via a crafted web site that triggers a CORS request.
How severe is CVE-2013-1639?: CVE-2013-1639 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2013-1639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1639?: CVE-2013-1639 primarily affects Opera Opera Browser. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1639?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-1639 published?: CVE-2013-1639 was published on 2013-02-08 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.00:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.00:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.02:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.10:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.10:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.11:*:*:*:*:*:*:*

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