What’s Vulnerable › Vulnerabilities

CVE-2004-0380

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 63.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2004-05-04 · updated 2026-06-16

Description

The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1 allows remote attackers to bypass domain restrictions and execute arbitrary code, as demonstrated on Internet Explorer using script in a compiled help (CHM) file that references the InfoTech Storage (ITS) protocol handlers such as (1) ms-its, (2) ms-itss, (3) its, or (4) mk:@MSITStore, aka the "MHTML URL Processing Vulnerability."

Affected products

• Microsoft Outlook Express: 5.5, 6.0

References

• http://secunia.com/advisories/10523
• http://www.k-otik.net/bugtraq/02.18.InternetExplorer.php
• http://www.kb.cert.org/vuls/id/323070
• http://www.securityfocus.com/archive/1/354447
• http://www.securityfocus.com/archive/1/358913
• http://www.securityfocus.com/bid/9105
• http://www.securityfocus.com/bid/9658
• http://www.us-cert.gov/cas/techalerts/TA04-104A.html
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-013
• https://exchange.xforce.ibmcloud.com/vulnerabilities/15705
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1010
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1028

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