Post Grid Gutenberg Blocks Plugin up to 5.0.40 on WordPress REST API Route information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in Post Grid Gutenberg Blocks Plugin up to 5.0.40. This impacts an unknown function of the component REST API Route. Such manipulation leads to information disclosure. This vulnerability is traded as CVE-2026-86783. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Post Grid Gutenberg Blocks Plugin up to 5.0.40. It has been rated as problematic. Affected by this issue is an unknown part of the component REST API Route. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at wpscan.com. This vulnerability is handled as CVE-2026-86783 since 09/08/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 5.0.41 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Name

• Post Grid Gutenberg Blocks Plugin

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.0.10
• 5.0.11
• 5.0.12
• 5.0.13
• 5.0.14
• 5.0.15
• 5.0.16
• 5.0.17
• 5.0.18
• 5.0.19
• 5.0.20
• 5.0.21
• 5.0.22
• 5.0.23
• 5.0.24
• 5.0.25
• 5.0.26
• 5.0.27
• 5.0.28
• 5.0.29
• 5.0.30
• 5.0.31
• 5.0.32
• 5.0.33
• 5.0.34
• 5.0.35
• 5.0.36
• 5.0.37
• 5.0.38
• 5.0.39
• 5.0.40

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