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Deserialization of Untrusted DataWeakness · CWE-502

CVE-2025-54007

HIGH · 8.8 CVSS v3.1 Published 2025-08-20
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
94/100
Remediation priority · Urgent
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
Deserialization of Untrusted Data vulnerability in PickPlugins Post Grid and Gutenberg Blocks post-grid allows Object Injection.This issue affects Post Grid and Gutenberg Blocks: from n/a through <= 2.3.11.

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 confidence

This is a PHP Object Injection vulnerability in the PickPlugins Post Grid and Gutenberg Blocks WordPress plugin. The vulnerability stems from deserialization of untrusted data (likely via PHP's unserialize() function), which allows attackers to inject arbitrary PHP objects. If PHP 'gadget chains' exist in the plugin or its dependencies, this could lead to remote code execution. The CVSS 8.8 indicates high exploitability and significant potential impact.

MitigationReplace unsafe deserialization (unserialize()) with safer alternatives like JSON encoding (json_encode/json_decode), implement proper input validation, and update to the latest patched version when available. Until patched, consider deploying a WAF rule to block serialized payloads.

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 checks

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

  1. Confirm the PickPlugins Post Grid plugin is installed
    Navigate to WordPress admin > Plugins and locate 'Post Grid and Gutenberg Blocks' by PickPlugins, or query the wp_plugins database table for 'post-grid'
    Affected if The plugin is active and installed
  2. Identify the installed plugin version
    Check the plugin header in main plugin file (post-grid/main.php) for 'Version:' line, or view in WordPress admin Plugins list
    Affected if Version is unknown or within a range that contains the vulnerable deserialization code
  3. Locate PHP deserialization calls in plugin code
    Search plugin directory for 'unserialize(' patterns using grep or IDE search: grep -r "unserialize" wp-content/plugins/post-grid/
    Affected if Code contains unserialize() calls processing untrusted input
  4. Identify input pathways accepting serialized data
    Review AJAX handlers (admin-ajax.php hooks) and REST API endpoints in the plugin that accept $_POST, $_GET, or request parameters passed to unserialize()
    Affected if Plugin accepts and deserializes user-supplied data without validation
  5. Check for PHP object injection gadget chains
    Audit plugin and its dependencies for classes with magic methods (__wakeup, __destruct, __toString, __call) that could form exploitation chains
    Affected if Gadget chain classes exist that could be chained with the deserialization flaw for RCE

A user is affected if the PickPlugins Post Grid plugin is installed, contains unserialize() calls processing untrusted input, and has accessible endpoints that accept serialized data without validation.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Replace unsafe deserialization (unserialize()) with safer alternatives like JSON encoding (json_encode/json_decode), implement proper input validation, and update to the latest patched version when available. Until patched, consider deploying a WAF rule to block serialized payloads.

Recommended fix Moderate confidence

Version 2.3.12 or later

  1. 1. Backup your WordPress site before making any changes
  2. 2. Navigate to Plugins > Installed Plugins in the WordPress admin dashboard
  3. 3. Locate 'Post Grid and Gutenberg Blocks' (post-grid) plugin
  4. 4. Click 'Update now' if version 2.3.12 or later is available, or manually download the latest version from WordPress.org
  5. 5. After updating, verify the new version number is >= 2.3.12

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing6.0 h
  • Review / QA4.0 h
20.0 hours of engineering $3,500
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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-2025-54007 in production — separate from our analysis above.

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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
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