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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2026-39434

HIGH · 7.2 CVSS v3.1 Published 2026-06-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

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 · unedited
Shop manager PHP Object Injection in CTX Feed <= 6.6.26 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 confidence

PHP Object Injection vulnerability in CTX Feed plugin versions 6.6.26 and below. The flaw allows authenticated users with Shop Manager role to deserialize untrusted data, potentially enabling remote code execution through malicious PHP objects. The vulnerability stems from insecure deserialization of user-supplied input.

MitigationUpdate CTX Feed to the latest version (above 6.6.26) as soon as a patch is released. Until then, restrict the Shop Manager role to trusted users only and monitor for suspicious activity.

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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify CTX Feed plugin is installed
    Navigate to WordPress admin > Plugins and look for 'CTX Feed' in the installed plugins list, or check the filesystem at /wp-content/plugins/ for a ctx-feed or similar directory
    Affected if CTX Feed plugin is installed and active
  2. Check installed CTX Feed version
    In WordPress admin > Plugins, find CTX Feed and view the version number displayed, or read the main plugin PHP file header for 'Version:' tag
    Affected if Version is 6.6.26 or lower
  3. Confirm Shop Manager role exists
    In WordPress admin > Users > Roles, verify if 'Shop Manager' role is present, or query wp_roles table for 'shop_manager' capability
    Affected if Shop Manager role is defined in the WordPress installation
  4. Check for active Shop Manager users
    In WordPress admin > Users, filter by role 'Shop Manager' to see if any users have this role assigned
    Affected if There is at least one active user with Shop Manager role

You are affected if CTX Feed plugin version 6.6.26 or lower is installed, the Shop Manager role exists, and at least one user has that role assigned.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update CTX Feed to the latest version (above 6.6.26) as soon as a patch is released. Until then, restrict the Shop Manager role to trusted users only and monitor for suspicious activity.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing3.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,210
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,936.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-39434 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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