Vulnerabilities / Custom Post Types and Custom Fields creator – WCK / WPSEC-2026-2996
Custom Post Types and Custom Fields creator – WCK <= 2.4.0 - Authenticated (Subscriber+) Missing Authorization to Post Meta Update via wck_sync_translation AJAX Action
Medium 4.3
CWE-862Fixed in 2.4.1
- ID
- WPSEC-2026-2996
- Plugin
- Custom Post Types and Custom Fields creator – WCK (wck-custom-fields-and-custom-post-types-creator)
- Affected
- all versions before 2.4.1
- Remediation
- Update to 2.4.1 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-12
- Attack surface
- Custom Post Types and Custom Fields creator – WCK on WPSec AttackSurface
- Fix released
- Published
Description
The WCK plugin for WordPress is vulnerable to unauthorized modification of data via the wck_sync_translation AJAX action in all versions up to, and including, 2.4.0, due to a missing capability check and missing nonce verification in the wck_sync_translation_ajax function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to rebuild and overwrite serialized WCK post meta on arbitrary posts that have legacy 'wckwpml_' translation custom fields.
References
- https://wpsec.com/vuln/WPSEC-2026-2996/
- https://plugins.svn.wordpress.org/wck-custom-fields-and-custom-post-types-creator/tags/2.4.1/
- https://wordpress.org/plugins/wck-custom-fields-and-custom-post-types-creator/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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