How severe is CVE-2012-4144?

CVE-2012-4144 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-4144 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-2012-4144?

CVE-2012-4144 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-2012-4144?

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

When was CVE-2012-4144 published?

CVE-2012-4144 was published on 2012-08-06 and last updated on 2026-06-16.

CVE-2012-4144

CVE-2012-4144 is a medium-severity vulnerability in Opera Opera Browser 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% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
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, does not properly escape characters in DOM elements, which makes it easier for remote attackers to bypass cross-site scripting (XSS) protection mechanisms via a crafted HTML document.

Frequently asked questions

What is CVE-2012-4144?: Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, does not properly escape characters in DOM elements, which makes it easier for remote attackers to bypass cross-site scripting (XSS) protection mechanisms via a crafted HTML document.
How severe is CVE-2012-4144?: CVE-2012-4144 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-4144 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-2012-4144?: CVE-2012-4144 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-2012-4144?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-4144 published?: CVE-2012-4144 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:*:*:*:*:*:*:*

More vulnerabilities in Opera Opera Browser

CVE-2013-3211 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe…
CVE-2012-4145 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS…
CVE-2012-3561 — Critical (CVSS 10.0): Opera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute…
CVE-2012-3559 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 12.00 on Mac OS X has unknown impact and attack vectors, related to a…
CVE-2011-4684 — Critical (CVSS 10.0): Opera before 11.60 does not properly handle certificate revocation, which has unspecified impact and remote attack…
CVE-2011-4683 — Critical (CVSS 10.0): Unspecified vulnerability in Opera before 11.60 has unknown impact and attack vectors, related to a "moderately severe…

All CVEs affecting Opera Opera Browser →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →