Vulnerability Report

CVE-2012-4142

Title: Opera Opera Browser Cross-Site Scripting (XSS)

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2012-4142.

CWE Category CWE-79

Published Date Aug 06, 2012

Modified Date Apr 29, 2026

Exploit Status Not Found

Score 4.3 CVSS v2.0

Exploit Probability (EPSS)

0.42%

Vulnerability Summary

CVE-2012-4142: 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.

Impacted Vendors

opera 1

Reference Links

http://www.opera.com/docs/changelogs/mac/1166/ http://www.opera.com/docs/changelogs/mac/1201/ http://www.opera.com/docs/changelogs/unix/1201/ http://www.opera.com/docs/changelogs/windows/1201/ http://www.opera.com/support/kb/view/1026/ http://www.opera.com/docs/changelogs/mac/1166/ http://www.opera.com/docs/changelogs/mac/1201/ http://www.opera.com/docs/changelogs/unix/1201/ http://www.opera.com/docs/changelogs/windows/1201/ http://www.opera.com/support/kb/view/1026/

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

4.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2012-4142 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

August 06, 2012 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected Stack

No specific products linked.