CVE-2003-1328

CVE-2003-1328 is a high-severity vulnerability in Microsoft Ie with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 39% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

The showHelp() function in Microsoft Internet Explorer 5.01, 5.5, and 6.0 supports certain types of pluggable protocols that allow remote attackers to bypass the cross-domain security model and execute arbitrary code, aka "Improper Cross Domain Security Validation with ShowHelp functionality."

Frequently asked questions

What is CVE-2003-1328?
The showHelp() function in Microsoft Internet Explorer 5.01, 5.5, and 6.0 supports certain types of pluggable protocols that allow remote attackers to bypass the cross-domain security model and execute arbitrary code, aka "Improper Cross Domain Security Validation with ShowHelp functionality."
How severe is CVE-2003-1328?
CVE-2003-1328 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2003-1328 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 39% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1328?
CVE-2003-1328 primarily affects Microsoft Ie. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1328?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2003-1328 published?
CVE-2003-1328 was published on 2003-02-19 and last updated on 2026-06-16.

References

Affected products (9)

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