How severe is CVE-2012-4143?

CVE-2012-4143 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2012-4143 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-4143?

CVE-2012-4143 primarily affects Opera Opera Browser. In total, 43 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-4143?

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

When was CVE-2012-4143 published?

CVE-2012-4143 was published on 2012-08-06 and last updated on 2026-06-16.

CVE-2012-4143

CVE-2012-4143 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-94.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Opera Opera Browser
Published: 2012-08-06
Last modified: 2026-06-16

Description

Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, allows user-assisted remote attackers to trick users into downloading and executing arbitrary files via a small window for the download dialog, a different vulnerability than CVE-2012-1924.

Frequently asked questions

What is CVE-2012-4143?: Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, allows user-assisted remote attackers to trick users into downloading and executing arbitrary files via a small window for the download dialog, a different vulnerability than CVE-2012-1924.
How severe is CVE-2012-4143?: CVE-2012-4143 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2012-4143 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-4143?: CVE-2012-4143 primarily affects Opera Opera Browser. In total, 43 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-4143?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4143 published?: CVE-2012-4143 was published on 2012-08-06 and last updated on 2026-06-16.

References

Affected products (43)

cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:12.00:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.00:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.00:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.00:beta2:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.00:beta3:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.10:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.10:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.11:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.50:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.50:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.50:beta2:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.51:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.52:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.52:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.52:beta2:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.53:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.53:b:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.53:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.54:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.60:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.60:beta1:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.61:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.62:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:10.63:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.00:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.00:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.10:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.10:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.11:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.50:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.50:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.51:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.52:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.52.1100:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.60:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.60:beta:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:11.61:*:*:*:*:*:*:*

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