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CVE-2004-0380
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."
Published: May 4, 2004
Modified: Jun 16, 2026
CVSS Metrics
Affected Products (2)
| Vendor | Product | Version |
|---|---|---|
| microsoft | outlook_express | 5.5 |
| microsoft | outlook_express | 6.0 |
GitHub Security Advisory GHSA-wv58-cxvm-2w2g
The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1...
References (28)
- http://secunia.com/advisories/10523
- http://www.k-otik.net/bugtraq/02.18.InternetExplorer.php
- http://www.kb.cert.org/vuls/id/323070 US Government Resource
- http://www.securityfocus.com/archive/1/354447 Patch, Vendor Advisory
- http://www.securityfocus.com/archive/1/358913 Exploit, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/9105
- http://www.securityfocus.com/bid/9658
- http://www.us-cert.gov/cas/techalerts/TA04-104A.html US Government Resource
- 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
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A882
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A990
- http://secunia.com/advisories/10523
Risk Scores
CVSS Score
10.0 / 10
EPSS Score
63.25%
Top 1% most likely to be exploited
Threat Score
59 / 100
Data Sources
NVD
EPSS
GitHub