How severe is CVE-2008-4381?

CVE-2008-4381 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-4381 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4381?

CVE-2008-4381 primarily affects Microsoft Internet Explorer. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4381?

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

When was CVE-2008-4381 published?

CVE-2008-4381 was published on 2008-10-02 and last updated on 2026-06-16.

CVE-2008-4381

CVE-2008-4381 is a medium-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Internet Explorer
Published: 2008-10-02
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 7 allows remote attackers to cause a denial of service (application crash) via Javascript that calls the alert function with a URL-encoded string of a large number of invalid characters.

Frequently asked questions

What is CVE-2008-4381?: Microsoft Internet Explorer 7 allows remote attackers to cause a denial of service (application crash) via Javascript that calls the alert function with a URL-encoded string of a large number of invalid characters.
How severe is CVE-2008-4381?: CVE-2008-4381 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-4381 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4381?: CVE-2008-4381 primarily affects Microsoft Internet Explorer. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4381?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-4381 published?: CVE-2008-4381 was published on 2008-10-02 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:internet_explorer:5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*

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