CVE-2026-39474
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 · uneditedContributor PHP Object Injection in Post Duplicator <= 3.0.10 versions.
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 confidenceThis is a PHP Object Injection vulnerability in the Post Duplicator WordPress plugin affecting versions 3.0.10 and below. The flaw allows a user with Contributor-level permissions to inject malicious PHP objects by exploiting the plugin's unserialization of user-supplied data, potentially leading to remote code execution if a suitable POP chain exists.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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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Locate the Post Duplicator plugin installationNavigate to WordPress admin > Plugins and find 'Post Duplicator' in the installed plugins list, or check the plugin files in /wp-content/plugins/ for a folder named 'post-duplicator'Affected if Post Duplicator plugin is installed and active
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Identify the installed versionIn the WordPress plugins page, click on the plugin to view its details and read the version number displayed, or open the main plugin PHP file (usually post-duplicator.php) and look for the 'Version' header in the plugin comment blockAffected if The version number is 3.0.10 or lower
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Verify user role configurationCheck WordPress user management to confirm whether any user accounts have the 'Contributor' role or higher privileges (Editor, Administrator, Author)Affected if At least one user with Contributor-level or higher access exists on the site
If Post Duplicator version 3.0.10 or below is installed with at least one Contributor-level user account present, the environment is potentially affected by this PHP Object Injection vulnerability.
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.
dbcve · scopedUpdate Post Duplicator to the latest version beyond 3.0.10, or if no patched version exists, remove the plugin and seek an alternative solution. Review the site for any signs of compromise.
Post Duplicator version 3.0.11 or later
- Backup your WordPress site before making any changes
- Navigate to Plugins > Installed Plugins in WordPress admin
- Locate the Post Duplicator plugin
- Click Update Now or update through Plugins > Add New > Upload if automatic updates are disabled
- After updating, verify the installed version is 3.0.11 or higher
- Test that the plugin's duplication functionality works correctly
- Clear any caching if applicable
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39474 — 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-2026-39474 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data