CVE-2012-3556

Severity: critical (CVSS 9.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-06-14 · updated 2026-06-16
Weakness: CWE-20

Description

Opera before 11.65 does not properly restrict the opening of a pop-up window in response to the first click of a double-click action, which makes it easier for user-assisted remote attackers to conduct cross-site scripting (XSS) attacks or execute arbitrary code via a crafted web site.

Affected products

Opera Browser: through 11.62; 5.0, 5.0-beta2, 5.0-beta3, 5.0-beta4, 5.0-beta5, 5.0-beta6 (+120)

References

http://www.opera.com/docs/changelogs/mac/1165/
http://www.opera.com/docs/changelogs/mac/1200/
http://www.opera.com/docs/changelogs/unix/1200/
http://www.opera.com/docs/changelogs/windows/1200/
http://www.opera.com/support/kb/view/1020/
http://www.opera.com/docs/changelogs/mac/1165/
http://www.opera.com/docs/changelogs/mac/1200/
http://www.opera.com/docs/changelogs/unix/1200/
http://www.opera.com/docs/changelogs/windows/1200/
http://www.opera.com/support/kb/view/1020/

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