CVE-2026-27414
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 Werkstatt <= 4.8.3 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 confidenceA PHP Object Injection vulnerability exists in the Werkstatt theme versions 4.8.3 and below. Attackers with Contributor-level permissions can potentially exploit unsafe deserialization of user-supplied data, which may lead to remote code execution depending on available POP (Property-Oriented Programming) chains within the application environment.
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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Identify if Werkstatt theme is installedLocate the theme files. In WordPress, check /wp-content/themes/werkstatt/ or similar theme directory for the existence of style.css which typically contains theme version info in its header comments.Affected if The Werkstatt theme files exist in the WordPress themes directory.
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Determine installed Werkstatt theme versionOpen the theme's style.css file located in the Werkstatt theme directory and look for the 'Version:' declaration in the CSS header comments. Compare this version number against 4.8.3.Affected if The discovered version number is 4.8.3 or lower.
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Verify if Contributor-level accounts can existCheck WordPress user roles by navigating to Users > All Users in the admin dashboard, or query the wp_usermeta table for users with wp_capabilities containing 'contributor'. Also review WordPress registration settings under General > Membership to see if anyone can register.Affected if Contributor-level user accounts exist or self-registration is enabled allowing new Contributor users.
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Inspect theme code for unsafe unserialize() usageSearch the Werkstatt theme files for 'unserialize' function calls, particularly examining any files that handle user input (POST, GET, cookie data, or database values that could be user-controlled. Common locations include functions.php, class files, or AJAX handlers.Affected if Code contains unserialize() calls processing data that originates from user input without prior sanitization.
You are affected if the Werkstatt theme version is 4.8.3 or lower AND Contributor-level users can exist in the WordPress installation AND the theme contains unserialize() handling user-supplied data.
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 Werkstatt to the latest version (beyond 4.8.3) which contains the security patch. If immediate upgrade is not possible, disable Contributor-level user registrations and review any code using unserialize() on user input.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27414 — 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-2026-27414 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
- No spam, self-promotion, credentials, or personal data