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CVE-2026-86783

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

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86783

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86783

Published

Post Grid Gutenberg Blocks

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Unknown",
                    "product": "Post Grid Gutenberg Blocks",
                    "versions": [
                        {
                            "status": "affected",
                            "versionType": "semver",
                            "version": "0",
                            "lessThan": "5.0.41"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON