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CVE-2004-2491
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…
Low2.6EPSS 6.3%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Timeline
ID reserved
By mitre
Published
- 19 years later
· 19 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Low2.6 | AV:N/AC:H/Au:N/C:N/I:P/A:N |
- EPSS (exploitation in 30 days)
- 6.3% · top 6.3% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.6.
Weakness
Affected products
n/a
- affected n/a
References (6)
- opera-addressbar-spoofing(16816) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20040726 Opera 7.53 (Build 3850) Address Bar Spoofing Issue (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 12162 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.opera.com/windows/changelogs/754/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- 8317 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 10810 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2004-2491)Record last updated .