CVE-2004-2491

Name: CVE-2004-2491
Creator: NVD / NIST
Published: 2004-12-31T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 6.32%

Last modified Jun 16, 2026

CVE-2004-2491 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 6.32% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

6.32%

92.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Opera	Opera Browser	<= 7.53

References

http://archives.neohapsis.com/archives/fulldisclosure/2004-07/1056.htmlBroken Link, Exploit
http://secunia.com/advisories/12162Broken Link, Patch
http://www.opera.com/windows/changelogs/754/Broken Link, Patch
http://www.osvdb.org/8317Broken Link, Exploit
http://www.securityfocus.com/bid/10810Broken Link, Exploit, Patch, Third Party Advisory, VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/16816Third Party Advisory, VDB Entry
http://archives.neohapsis.com/archives/fulldisclosure/2004-07/1056.htmlBroken Link, Exploit
http://secunia.com/advisories/12162Broken Link, Patch
http://www.opera.com/windows/changelogs/754/Broken Link, Patch
http://www.osvdb.org/8317Broken Link, Exploit
http://www.securityfocus.com/bid/10810Broken Link, Exploit, Patch, Third Party Advisory, VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/16816Third Party Advisory, VDB Entry

Timeline

Published: Dec 31, 2004
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2004-2491?

How severe is CVE-2004-2491?

Severity scoring for CVE-2004-2491 is pending analysis. The EPSS model estimates a 6.32% probability of exploitation in the next 30 days.

How do I fix CVE-2004-2491?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2004-2491?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST