CVE-2026-24352
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 · uneditedPluXml CMS allows a user's session identifier to be set before authentication. The value of this session ID stays the same after authentication. This behaviour enables an attacker to fix a session ID for a victim and later hijack the authenticated session. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 5.8.21 and 5.9.0-rc7 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.
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 confidencePluXml CMS contains a session fixation vulnerability where an attacker can set a user's session identifier prior to authentication. The session ID remains unchanged after successful login, allowing the attacker to fix a known session ID and subsequently hijack the victim's authenticated session.
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= 5.8.21= 5.9.0CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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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Confirm PluXml CMS is installedCheck if PluXml files exist on the server by looking for characteristic files like index.php, core/admin.php, or the pluxml version file typically located at pluxml/version.txt or core/version.txtAffected if PluXml CMS is found to be installed on the server
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Identify installed PluXml versionLocate the version file in the PluXml installation directory (commonly pluxml/version.txt or core/version.txt) and read the version numberAffected if The installed version is either 5.8.21 or 5.9.0 exactly
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Verify PHP session handling is in useCheck if PHP sessions are enabled and being used by inspecting the application for session_start() calls or session-related configuration in PluXml core filesAffected if PHP sessions are active and PluXml is using session-based authentication
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Check for session ID regeneration after authenticationExamine PluXml authentication code (typically in core/auth.php or similar login processing files) for the presence of session_regenerate_id() calls immediately following successful login validationAffected if No session_regenerate_id() call is found in the authentication flow, meaning session IDs are NOT being regenerated after login
A user is affected if they have PluXml version 5.8.21 or 5.9.0 installed and the application does not regenerate session identifiers after successful authentication, allowing session fixation attacks.
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 dataRegenerate the session identifier upon successful authentication using session_regenerate_id(true) and invalidate the old session to prevent session fixation attacks.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-24352 — 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-2026-24352 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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- Version or environment caveats, and links to real fixes
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