CVE-2004-0380
The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1...
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."
Exploit likelihood
What each source reports
NVD Score used
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."
- Record
CVE-2004-0380- CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
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."
- Record
CVE-2004-0380- Updated
- 2026-11-02
EUVDEUVD-2004-0380 No score
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."
- Record
EUVD-2004-0380- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wv58-cxvm-2w2g No score
The MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through Outlook Express 6 SP1...
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."
- Record
GHSA-wv58-cxvm-2w2g- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Microsoft Outlook Express 6.0 - '.MHTML' Forced File Execution (1) | 2003-11-25 |
| Exploit-DB | Microsoft Outlook Express 6.0 - MHTML Forced File Execution (2) | 2003-11-25 |
| Exploit-DB | Microsoft Internet Explorer 5.0.1 - ITS Protocol Zone Bypass (MS04-013) | 2004-02-13 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2004-0380 is a high vulnerability (CVSS 10.0) in Microsoft Outlook Express, published April 6, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 63.2%, the 99th percentile. No source names a fixed version.
References
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A990
securityfocus.com/bid/9105
kb.cert.org/vuls/id/323070
exchange.xforce.ibmcloud.com/vulnerabilities/15705
docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-013
Show 10 moreShow less
us-cert.gov/cas/techalerts/TA04-104A.html
k-otik.net/bugtraq/02.18.InternetExplorer.php
secunia.com/advisories/10523
nvd.nist.gov/vuln/detail/CVE-2004-0380
github.com/advisories/GHSA-wv58-cxvm-2w2g