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OpenAdvisories
Medium · 5.3 CVE-2026-86783 EUVD-2026-85045GHSA-f7w9-vf85-gjj5

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

Published Sep 23, 2026 · Updated Sep 23, 2026 · Assigned by WPScan

Description

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 private, draft, pending, scheduled and password-protected posts.

Affected products

VendorProductAffectedFixed
— Post Grid Gutenberg Blocks < 5.0.41 5.0.41

References