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Vulnerability record · CVE-2003-1328 · published 19 February 2003

CVE-2003-1328: Microsoft ie vulnerability

Microsoft · Ie

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."

7.5 CVSS 2.0 High EPSS 39% · top 1.5%
7.5CVSS 2.0 base score
39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

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."

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.neohapsis.com/archives/bugtraq/2003-02/0083.html
http://www.ciac.org/ciac/bulletins/n-038.shtml
http://www.iss.net/security_center/static/11259.php Vendor Advisory
http://www.kb.cert.org/vuls/id/400577 US Government Resource
http://www.securityfocus.com/bid/6780
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-004
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A57
http://archives.neohapsis.com/archives/bugtraq/2003-02/0083.html
http://www.ciac.org/ciac/bulletins/n-038.shtml
http://www.iss.net/security_center/static/11259.php Vendor Advisory
http://www.kb.cert.org/vuls/id/400577 US Government Resource
http://www.securityfocus.com/bid/6780
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-004
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A57

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2003-1328), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.