Vulnerability in Microsoft Outlook Express

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."

EPSS: 0.632 (99.1th percentile) — read the EPSS interpretation.

Affected products

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2004-0380?
CVE-2004-0380 is a vulnerability in Microsoft Outlook Express. Published 2004-05-04.
Is CVE-2004-0380 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.