How severe is CVE-2008-4324?

CVE-2008-4324 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-4324 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4324?

CVE-2008-4324 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4324?

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

When was CVE-2008-4324 published?

CVE-2008-4324 was published on 2008-09-29 and last updated on 2026-06-16.

CVE-2008-4324

CVE-2008-4324 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.0. 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-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Mozilla Firefox
Published: 2008-09-29
Last modified: 2026-06-16

Description

The user interface event dispatcher in Mozilla Firefox 3.0.3 on Windows XP SP2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a series of keypress, click, onkeydown, onkeyup, onmousedown, and onmouseup events. NOTE: it was later reported that Firefox 3.0.2 on Mac OS X 10.5 is also affected.

Frequently asked questions

What is CVE-2008-4324?: The user interface event dispatcher in Mozilla Firefox 3.0.3 on Windows XP SP2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a series of keypress, click, onkeydown, onkeyup, onmousedown, and onmouseup events. NOTE: it was later reported that Firefox 3.0.2 on Mac OS X 10.5 is also affected.
How severe is CVE-2008-4324?: CVE-2008-4324 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-4324 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4324?: CVE-2008-4324 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4324?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-4324 published?: CVE-2008-4324 was published on 2008-09-29 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:3.0.3:*:*:*:*:*:*:*

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