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CVE-2004-2491

2.6 · LOW

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…

Published Dec 31, 2004operaCWE-362EPSS 6.32%

Overview

CVE-2004-2491 is a low-severity vulnerability affecting opera opera_browser. It was published on December 31, 2004 and has a CVSS 2.0 base score of 2.6 (LOW).

This vulnerability has a CVSS 2.0 base score of 2.6, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from opera. Update opera_browser to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
operaopera_browser0Affected

References

Refarchives.neohapsis.com/archives/fulldisclosure/2004-07/1056.htmlRefsecunia.com/advisories/12162Refwww.opera.com/windows/changelogs/754/Refwww.osvdb.org/8317Refwww.securityfocus.com/bid/10810Refexchange.xforce.ibmcloud.com/vulnerabilities/16816Refarchives.neohapsis.com/archives/fulldisclosure/2004-07/1056.htmlRefsecunia.com/advisories/12162Refwww.opera.com/windows/changelogs/754/Refwww.osvdb.org/8317

How CyberStrike helps

Frequently asked questions

What is CVE-2004-2491?

CVE-2004-2491 is a low-severity vulnerability affecting opera opera_browser. It was published on December 31, 2004 and has a CVSS 2.0 base score of 2.6 (LOW).

How severe is CVE-2004-2491?

This vulnerability has a CVSS 2.0 base score of 2.6, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2004-2491?

Check the references section for vendor advisories and patches from opera. Update opera_browser to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2004-2491?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2004-2491 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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