{"cve":"CVE-2011-4681","nvd":{"published":"2011-12-07T19:55:02.517","modified":"2026-06-16T23:35:13.820","status":"Modified","description":"Opera before 11.60 does not properly consider the number of . (dot) characters that conventionally exist in domain names of different top-level domains, which allows remote attackers to bypass the Same Origin Policy by leveraging access to a different domain name in the same top-level domain, as demonstrated by the .no or .uk domain.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://www.opera.com/docs/changelogs/mac/1160/","http://www.opera.com/docs/changelogs/unix/1160/","http://www.opera.com/docs/changelogs/windows/1160/","http://www.opera.com/support/kb/view/1003/","http://www.opera.com/docs/changelogs/mac/1160/"],"products":["opera:opera_browser"],"source":"nvd","synced_at":"2026-10-19T19:59:31.623151214+00:00"},"epss":{"cve":"CVE-2011-4681","score":0.01978,"percentile":0.80514,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}