CVE-2012-1251

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-06-04 · updated 2026-06-16
Weakness: CWE-310

Description

Opera before 9.63 does not properly verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

Affected products

Opera Browser: through 9.62; 1.00, 2.00, 2.10, 2.10-beta1, 2.10-beta2, 2.10-beta3 (+107)

References

http://jvn.jp/en/jp/JVN39707339/index.html
http://jvndb.jvn.jp/jvndb/JVNDB-2012-000049
http://www.opera.com/docs/changelogs/mac/963/
http://www.opera.com/docs/changelogs/unix/963/
http://www.opera.com/docs/changelogs/windows/963/
http://jvn.jp/en/jp/JVN39707339/index.html
http://jvndb.jvn.jp/jvndb/JVNDB-2012-000049
http://www.opera.com/docs/changelogs/mac/963/
http://www.opera.com/docs/changelogs/unix/963/
http://www.opera.com/docs/changelogs/windows/963/

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