CVE-2011-4681

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-12-07 · updated 2026-06-16
Weakness: CWE-264

Description

Opera before 11.60 does not properly consider the number of . (dot) characters that conventionally exist in domain names of different top-level domains, which allows remote attackers to bypass the Same Origin Policy by leveraging access to a different domain name in the same top-level domain, as demonstrated by the .no or .uk domain.

Affected products

Opera Browser: through 11.60; 5.0, 5.0-beta2, 5.0-beta3, 5.0-beta4, 5.0-beta5, 5.0-beta6 (+116)

References

http://www.opera.com/docs/changelogs/mac/1160/
http://www.opera.com/docs/changelogs/unix/1160/
http://www.opera.com/docs/changelogs/windows/1160/
http://www.opera.com/support/kb/view/1003/
http://www.opera.com/docs/changelogs/mac/1160/
http://www.opera.com/docs/changelogs/unix/1160/
http://www.opera.com/docs/changelogs/windows/1160/
http://www.opera.com/support/kb/view/1003/

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