Medium

XSS in Windows Me Help and Support Center via hcp:// topic parameter

IdentifiersCVE-2003-0009CWE-79

Cross-site scripting (XSS) vulnerability in the Microsoft Windows Me Help and Support Center due to improper validation of parameters in hcp:// URLs. A remote attacker can supply an hcp:// URL containing malicious script in the topic parameter, causing the script to execute in the Local Computer security context when processed by the Help and Support Center.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Arbitrary script execution in the Local Computer security context. This can enable actions with the privileges of the current user, including adding, deleting, or modifying data, and potentially taking full control of the affected system. On Windows Me, the lack of privilege separation means any local user effectively has complete control once code is executed in this context.

Mitigation

If you can’t patch tonight, do this now.

Apply the Outlook Email Security Update to prevent automatic parsing of hcp:// URIs in Outlook 98 and 2000, increasing required user interaction for exploitation. This is a workaround and does not remediate the underlying Help and Support Center input validation flaw.

Remediation

Patch, then assume compromise.

Apply vendor patches via Windows Update. Specifically: install the Windows Me security update package "812709: Security Update (Windows Me)". For Windows XP, apply Service Pack 1a and/or the patch referenced in MS02-060 (Q328940), or use Windows Update to obtain the relevant fix.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft CorporationWindows Meoperating_system

Microsoft CorporationWindows Xpoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity