Opera address bar spoofing vulnerability


Opera contains a vulnerability where the URL displayed in the address bar may be spoofed.

Opera contains a vulnerability where certain characters may be displayed in the address bar, causing 2 URLs to potentially be indistinguishable from each other.

Masahiro Yamada reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Opera Software ASA
  • Opera versions prior to 11.60


Phishing attacks may be possible, due to the difficulty in determining that the URL displayed in the address bar and the URL being accessed are different.

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Update to the latest version according to the information provided by the developer.
Vendor Information

Opera Software ASA
CWE (What is CWE?)

  1. No Mapping(CWE-Other) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2012-4010

  1. JVN : JVN#69880570
  2. National Vulnerability Database (NVD) : CVE-2012-4010
Revision History

  • [2012/08/30]
      Web page was published
      References : Content was added