{"cve":"CVE-2004-2491","nvd":{"published":"2004-12-31T05:00:00.000","modified":"2026-06-16T22:09:45.193","status":"Modified","description":"A race condition in Opera web browser 7.53 Build 3850 causes Opera to fill in the address bar before the page has been loaded, which allows remote attackers to spoof the URL in the address bar via the window.open and location.replace HTML parameters, which facilitates phishing attacks.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-362"],"references":["http://archives.neohapsis.com/archives/fulldisclosure/2004-07/1056.html","http://secunia.com/advisories/12162","http://www.opera.com/windows/changelogs/754/","http://www.osvdb.org/8317","http://www.securityfocus.com/bid/10810"],"products":["opera:opera_browser"],"source":"nvd","synced_at":"2026-10-19T19:38:22.000386253+00:00"},"epss":{"cve":"CVE-2004-2491","score":0.06317,"percentile":0.93617,"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."]}