How severe is CVE-2004-2659?

CVE-2004-2659 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2004-2659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-2659?

CVE-2004-2659 primarily affects Mozilla. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-2659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-2659 published?

CVE-2004-2659 was published on 2004-12-31 and last updated on 2026-06-16.

CVE-2004-2659

CVE-2004-2659 is a medium-severity vulnerability in Mozilla with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Mozilla
Published: 2004-12-31
Last modified: 2026-06-16

Description

Opera offers an Open button to verify that a user wishes to execute a downloaded file, which allows user-assisted remote attackers to construct a race condition that tricks a user into clicking Open via a request for a different mouse or keyboard action very shortly before the Open dialog appears. NOTE: this is a different issue than CVE-2005-2407.

Frequently asked questions

What is CVE-2004-2659?: Opera offers an Open button to verify that a user wishes to execute a downloaded file, which allows user-assisted remote attackers to construct a race condition that tricks a user into clicking Open via a request for a different mouse or keyboard action very shortly before the Open dialog appears. NOTE: this is a different issue than CVE-2005-2407.
How severe is CVE-2004-2659?: CVE-2004-2659 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2004-2659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-2659?: CVE-2004-2659 primarily affects Mozilla. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-2659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-2659 published?: CVE-2004-2659 was published on 2004-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:mozilla:mozilla:-:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:-:*:*:*:*:*:*:*

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