CVE-2023-40695
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 · uneditedIBM Cognos Controller 10.4.1, 10.4.2, and 11.0.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 264938.
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 confidenceIBM Cognos Controller versions 10.4.1, 10.4.2, and 11.0.0 fails to invalidate user sessions upon logout, leaving active sessions accessible. This session fixation vulnerability allows an authenticated attacker to potentially impersonate other users by reusing or continuing a session after the legitimate user logs out.
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= 10.4.1= 10.4.2= 11.0.0CVSS 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
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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Verify IBM Cognos Controller installed versionAccess the IBM Cognos Controller About page or check the installation directory for version information. Typically found in the product UI under Help > About or in the installation logs.Affected if The installed version is 10.4.1, 10.4.2, or 11.0.0 exactly.
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Confirm session remains active after logoutLog in to IBM Cognos Controller with a test account, capture the session identifier or cookie, then log out. Attempt to use the original session identifier in a new request to access protected resources.Affected if The session is still valid and allows access after logout has been completed.
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Inspect session management configurationExamine the IBM Cognos Controller configuration files for session timeout and invalidation settings. Check web.xml or similar configuration files in the installation directory for session-config settings.Affected if Session timeout is set but no explicit session.invalidate() call is made upon logout action.
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Review session cookie behaviorUse browser developer tools or a proxy to capture the session cookie during login, then after clicking logout, resend the original request with that same cookie to see if it is accepted.Affected if The server accepts and processes requests using the session cookie after the user has logged out.
You are affected if your IBM Cognos Controller version is exactly 10.4.1, 10.4.2, or 11.0.0 AND sessions can be reused after the logout action is performed.
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 dataApply vendor-supplied patch or upgrade to a version where session invalidation is properly implemented. Until patch is available, monitor session activity for anomalies and consider additional session timeout controls at the infrastructure level.
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-40695 — 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-2023-40695 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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