WordPress Post Grid Gutenberg Blocks plugin < 5.0.41 - Unauthenticated Custom Field Key Disclosure vulnerability

Unauthenticated Custom Field Key Disclosure vulnerability discovered by Pedro Pinho in WordPress Plugin PostX versions 5.0.41...

CVE-2026-86783 PostX < 5.0.41 - Unauthenticated Custom Field Key Disclosure via REST API

The Post Grid Gutenberg Blocks WordPress plugin before 5.0.41 does not perform an authorization or post-visibility check on a REST API route that returns the custom field keys of a given post, allowing unauthenticated users to disclose the custom field key names of arbitrary posts, including...

CVE-2026-86783

The Post Grid Gutenberg Blocks WordPress plugin (versions before 5.0.41 ) contains a vulnerability where it fails to perform proper authorization or post-visibility checks on a specific REST API route. This flaw allows unauthenticated users to disclose the custom field key names of arbitrary post...