madalinungureanu Custom Post Types and Custom Fields creator Plugin AJAX admin-ajax.php wck_show_update_form improper authorization

Summaryinfo

A vulnerability classified as problematic has been found in madalinungureanu Custom Post Types and Custom Fields creator Plugin up to 2.4.0. The impacted element is the function wck_show_update_form of the file admin-ajax.php of the component AJAX Handler. The manipulation of the argument nonce/meta_key/post_id leads to improper authorization. This vulnerability is traded as CVE-2026-125745. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in madalinungureanu Custom Post Types and Custom Fields creator Plugin up to 2.4.0. This issue affects the function wck_show_update_form of the file admin-ajax.php of the component AJAX Handler. The manipulation of the argument nonce/meta_key/post_id with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at wordpress.org. The identification of this vulnerability is CVE-2026-125745 since 11/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

By approaching the search of inurl:admin-ajax.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.4.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• madalinungureanu

Name

• Custom Post Types and Custom Fields creator Plugin

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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