CVE-2004-0380
Published Apr 6, 2004 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
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."
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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."
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- 45%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- oval:org.mitre.oval:def:990 ↗
- 9105 ↗
- VU#323070 ↗
- oval:org.mitre.oval:def:1010 ↗
- outlook-mhtml-execute-code(15705) ↗
- MS04-013 ↗
- 9658 ↗
- TA04-104A ↗
- oval:org.mitre.oval:def:882 ↗
- www.k-otik.net ↗
- 20040328 IE ms-its: and mk:@MSITStore: vulnerability ↗
- 20040219 Microsoft Internet Explorer Unspecified CHM File Processing Arbitrary Code Execution Vulnerability (bid 9658) ↗
Record history
Published Apr 6, 2004 · Last refreshed Oct 23, 2026