{"id":"CVE-2012-1251","aliases":["EUVD-2012-1277","GHSA-rmmq-mjp3-4464"],"status":"published","title":"Opera before 9.63 does not properly verify X.509 certificates from SSL servers, which allows man...","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.","severity":{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00594,"percentile":0.48657,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-310"],"published":"2012-06-04T17:00:00Z","modified":"2026-06-16T23:39:19Z","products":[{"vendor":"opera","product":"opera_browser"}],"references":[{"url":"http://www.opera.com/docs/changelogs/mac/963/","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.opera.com/docs/changelogs/windows/963/","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.opera.com/docs/changelogs/unix/963/","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://jvn.jp/en/jp/JVN39707339/index.html","tags":["third-party-advisory","x_refsource_JVN","x_transferred"]},{"url":"http://jvndb.jvn.jp/jvndb/JVNDB-2012-000049","tags":["third-party-advisory","x_refsource_JVNDB","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-1251"},{"url":"http://www.opera.com/docs/changelogs/mac/963"},{"url":"http://www.opera.com/docs/changelogs/unix/963"},{"url":"http://www.opera.com/docs/changelogs/windows/963"},{"url":"https://github.com/advisories/GHSA-rmmq-mjp3-4464"}],"sources":{"cve":[{"id":"CVE-2012-1251","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.","status":"published","published":"2012-06-04T17:00:00Z","modified":"2024-09-16T19:40:36.433Z","updated_at":"2026-11-02T14:34:52.27879Z"}],"euvd":[{"id":"EUVD-2012-1277","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.","status":"published","published":"2012-06-04T17:00:00Z","modified":"2024-09-16T19:40:36Z","updated_at":"2026-11-03T00:55:20.992168Z"}],"ghsa":[{"id":"GHSA-rmmq-mjp3-4464","title":"Opera before 9.63 does not properly verify X.509 certificates from SSL servers, which allows man...","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.","status":"published","published":"2022-05-17T04:51:13Z","modified":"2025-04-11T03:59:07Z","updated_at":"2026-11-02T15:01:11.088321Z"}],"nvd":[{"id":"CVE-2012-1251","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.","status":"published","published":"2012-06-04T17:55:01.633Z","modified":"2026-06-16T23:39:19.36Z","cvss":[{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-310"],"updated_at":"2026-11-02T14:02:14.336529Z"}]}}