CVE-2012-4021
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 · uneditedMosP kintai kanri before 4.1.0 does not properly perform authentication, which allows remote authenticated users to impersonate arbitrary user accounts, and consequently obtain sensitive information or modify settings, via unspecified vectors.
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 · moderate confidenceMosP kintai kanri before version 4.1.0 contains an improper authentication vulnerability that allows remote authenticated users to impersonate arbitrary user accounts. This authentication bypass enables attackers to gain unauthorized access to sensitive information and modify system settings by hijacking other user sessions.
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<= 4.0.9CVSS 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
- Single
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- None
AV:N/AC:L/Au:S/C:P/I:P/A:N
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 the installed MosP kintai kanri versionAccess the application administration panel or check the application metadata file (such as version manifest, About page, or system information screen) to locate the exact version number currently deployedAffected if The displayed version is 4.0.9 or any earlier version (4.0.x where x is less than 9, or any 4.0.0-x release)
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Verify remote access exposureConfirm whether the MosP kintai kanri web interface is accessible from network locations outside the local intranet. Check firewall rules, reverse proxy configuration, or DMZ settings that expose the application port to untrusted networksAffected if The application HTTP/HTTPS ports are reachable from the internet or untrusted internal network segments
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Confirm user authentication is enabledReview the application security configuration to verify that user authentication is active (not in anonymous or bypass mode), as the flaw only affects authenticated sessionsAffected if Remote users can authenticate to the system with valid credentials
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Examine authentication logs for session anomaliesSearch authentication and session logs for entries where the same session token or user ID appears to switch between different accounts in short time intervals, or for repeated POST requests to session manipulation endpointsAffected if Logs contain sequential authentication events where one session ID rapidly alternates between different user accounts
A user is affected if running MosP kintai kanri version 4.0.9 or earlier that is exposed to remote authenticated users, as the improper authentication flaw enables session hijacking of arbitrary user accounts.
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 dataUpgrade MosP kintai kanri to version 4.1.0 or later which addresses the improper authentication vulnerability. Additionally, review access logs for any suspicious session hijacking or unauthorized account access.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,464.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4021 — 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-2012-4021 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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