CVE-2005-4266
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedWorldClient.dll in Alt-N MDaemon and WorldClient 8.1.3 trusts a Session parameter that contains a randomly generated session ID that is associated with a username, which allows remote attackers to perform actions as other users by guessing or sniffing the random value.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceWorldClient.dll in Alt-N MDaemon and WorldClient 8.1.3 contains a session hijacking vulnerability where the Session parameter containing the session ID is trusted without proper validation. The randomly generated session IDs are predictable, allowing remote attackers to guess or sniff valid session IDs and perform actions as other users.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 8.1.3= 8.1.3CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify installed MDaemon or WorldClient versionCheck the program version through the Windows 'Add or Remove Programs' panel, or locate the MDaemon/WorldClient installation directory and look for version information in the main executable or an About dialog. Common locations include C:\MDaemon or C:\Program Files\Alt-N\MDaemon\.Affected if The installed version is exactly 8.1.3 for either MDaemon or WorldClient.
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Verify WorldClient web interface is enabledCheck the MDaemon configuration for WorldClient settings. Look for WorldClient-related configuration files in the MDaemon\app directory, or check if the WorldClient service/process is running on the system.Affected if WorldClient (the webmail component) is installed and running on the server.
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Confirm web server is listening and accessibleCheck if MDaemon's WorldClient HTTP/HTTPS service is bound to a network interface. Look for listening ports (typically 3000 for HTTP or 443 for HTTPS) using 'netstat -an' or review the WorldClient configuration for bound IP addresses.Affected if The WorldClient web interface is exposed on a reachable network port.
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Review session handling configurationExamine MDaemon configuration files (particularly worldclient.ini or similar) for session management settings. Look for any configuration controlling session ID generation or validation.Affected if Session validation is disabled or set to trust client-supplied session IDs without server-side verification.
You are affected if MDaemon or WorldClient version 8.1.3 is installed AND the WorldClient web interface is enabled and accessible, since the vulnerability exists in the WorldClient.dll component's session handling.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement cryptographically secure random session IDs with sufficient entropy, add proper server-side session validation on each request, and consider implementing additional authentication factors or session binding to IP addresses.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2005-4266 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2005-4266 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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