CVE-2012-3557: Opera Browser

Medium severity, CVSS 5.0. EPSS: 1.7% chance of exploitation in the next 30 days.

Opera before 11.65 does not properly restrict the reading of JSON strings, which allows remote attackers to perform cross-domain loading of JSON resources and consequently obtain sensitive information via a crafted web site.

Affected products

• Opera Opera Browser: up to and including 11.62; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

Published 2012-06-14. Last modified 2026-06-16.