{"id":"CVE-2004-2491","aliases":["EUVD-2004-2482","GHSA-6rch-h7pj-5838"],"status":"published","title":"A race condition in Opera web browser 7.53 Build 3850 causes Opera to fill in the address bar...","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.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.06317,"percentile":0.93662,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-362"],"published":"2004-12-31T05:00:00Z","modified":"2026-06-16T22:09:45Z","exploits":[{"source":"exploitdb","id":"EDB-24325","title":"Opera Web Browser 7.53 - Location Replace URI Obfuscation","type":"remote","platform":"multiple","date":"2004-07-27","verified":true,"url":"https://www.exploit-db.com/exploits/24325"}],"products":[{"vendor":"opera","product":"opera_browser"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/16816","tags":["vdb-entry","x_refsource_XF","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://archives.neohapsis.com/archives/fulldisclosure/2004-07/1056.html","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Broken Link","Exploit"]},{"url":"http://secunia.com/advisories/12162","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Broken Link","Patch"]},{"url":"http://www.opera.com/windows/changelogs/754/","tags":["x_refsource_CONFIRM","x_transferred","Broken Link","Patch"]},{"url":"http://www.osvdb.org/8317","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","Broken Link","Exploit"]},{"url":"http://www.securityfocus.com/bid/10810","tags":["vdb-entry","x_refsource_BID","x_transferred","Broken Link","Exploit","Patch","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2004-2491"},{"url":"http://www.opera.com/windows/changelogs/754"},{"url":"https://github.com/advisories/GHSA-6rch-h7pj-5838"}],"sources":{"cve":[{"id":"CVE-2004-2491","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.","status":"published","published":"2005-10-25T04:00:00Z","modified":"2024-08-08T01:29:13.588Z","updated_at":"2026-11-02T14:34:53.357376Z"}],"euvd":[{"id":"EUVD-2004-2482","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.","status":"published","published":"2005-10-25T04:00:00Z","modified":"2024-08-08T01:29:13Z","updated_at":"2026-11-03T01:15:10.048939Z"}],"ghsa":[{"id":"GHSA-6rch-h7pj-5838","title":"A race condition in Opera web browser 7.53 Build 3850 causes Opera to fill in the address bar...","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.","status":"published","published":"2022-04-29T03:01:33Z","modified":"2025-04-03T04:05:45Z","cwes":["CWE-362"],"updated_at":"2026-11-02T15:00:40.646262Z"}],"nvd":[{"id":"CVE-2004-2491","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.","status":"published","published":"2004-12-31T05:00:00Z","modified":"2026-06-16T22:09:45.193Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:00:53.133049Z"}]}}