CVE-2012-3557: n/a vulnerability

CVE-2012-3557: Opera before 11.65 does not properly restrict the reading of JSON strings, which allows remote attackers to...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 20:12 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Opera browser issue where versions before 11.65 could let a malicious website read JSON data from another domain. Business risk is limited to users still running that legacy browser, but exposed users could have sensitive web data disclosed after visiting a crafted site. Exposure is most likely in unmanaged endpoints, kiosks, legacy images, or test environments still using Opera before 11.65. Modern supported browsers are not identified as affected in the provided sources. Treat this as a legacy exposure cleanup item, not an emergency, unless vulnerable Opera versions are still present in business workflows or shared systems. Mitigation focus: Remove or upgrade Opera versions earlier than 11.65.; Prefer a current supported browser on managed endpoints.; Block unsupported browser versions through endpoint policy where possible..

Prepared: Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 14, 2012, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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