CVE-2026-125745
Received Received - Intake

Missing Authorization in WCK Plugin Exposes Post-Meta Data

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: VulnCheck

Description
Custom Post Types and Custom Fields creator (WCK) before 2.4.1 contains a missing authorization vulnerability that allows authenticated attackers with access to any WCK meta box to read custom-field values on posts they cannot edit by exploiting the wck_show_update_form AJAX handler, which lacks the capability checks enforced by other handlers and relies on a shared, non-unique nonce action. Attackers can send a crafted admin-ajax.php request with a valid wck-edit-entry nonce, a target meta key, and an arbitrary post ID to disclose sensitive post-meta or option values belonging to other users, including private or draft post data.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-125745
EUVD
EUVD-2026-120899

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
madalinungureanu Custom Post Types and Custom Fields creator – WCK From 0 (inc) to 2.4.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability is a missing authorization flaw in the Custom Post Types and Custom Fields creator (WCK) plugin before version 2.4.1. It allows authenticated attackers with access to any WCK meta box to read custom-field values on posts they cannot edit by exploiting the wck_show_update_form AJAX handler, which lacks proper capability checks and relies on a shared nonce.

Detection Guidance

Check for outdated WCK plugin versions before 2.4.1 by inspecting WordPress admin panel or running grep -r 'wck-custom-fields-and-custom-post-types-creator' /path/to/wordpress/plugins/. Monitor admin-ajax.php requests for unusual wck-edit-entry nonce usage or meta key exposure.

Impact Analysis

An attacker could exploit this to read sensitive post-meta or option values belonging to other users, including private or draft post data. This could lead to unauthorized access to confidential information stored in custom fields.

Mitigation Strategies

Update WCK plugin to version 2.4.1 or later immediately. Remove unnecessary user access to WCK meta boxes. Review server logs for suspicious admin-ajax.php requests with wck-edit-entry nonces. Consider disabling the plugin temporarily if an update is unavailable.

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