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Unrated severityNVD Advisory· Published Aug 6, 2012· Updated Jun 16, 2026

CVE-2012-4142

CVE-2012-4142

Description

Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, ignores some characters in HTML documents in unspecified circumstances, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

44
  • Opera/Opera Browser43 versions
    cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*+ 42 more
    • cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*range: <=12.00
    • 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:*:*:*:*:*:*:*
    • cpe:2.3:a:opera:opera_browser:11.62:*:*:*:*:*:*:*
    • cpe:2.3:a:opera:opera_browser:11.64:*:*:*:*:*:*:*
    • cpe:2.3:a:opera:opera_browser:12.00:*:*:*:*:*:*:*
    • cpe:2.3:a:opera:opera_browser:12.00:beta:*:*:*:*:*:*
  • Opera/Operallm-fuzzy
    Range: <12.01 on Windows and UNIX, <11.66 and <12.01 on Mac OS X

Patches

Vulnerability mechanics

References

5

News mentions

0

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