Microsoft · Mhtml · CVE-2004-0380
**Name of the Vulnerable Software and Affected Versions**
Microsoft Outlook Express versions 5.5 SP2 through 6 SP1
**Description**
The issue allows remote attackers to bypass domain restrictions and execute arbitrary code. This can be demonstrated on Internet Explorer using script in a compiled help (CHM) file that references specific protocol handlers, such as `ms-its`, `ms-itss`, `its`, or `mk:@MSITStore`.
**Recommendations**
For Microsoft Outlook Express versions 5.5 SP2 through 6 SP1, consider disabling the MHTML protocol handler as a temporary workaround until a patch is available. Restrict access to compiled help files that reference the InfoTech Storage (ITS) protocol handlers to minimize the risk of exploitation.