CVE-2026-86783 — MEDIUM (5.3)

Vulnerability 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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-200

References

https://wpscan.com/vulnerability/719fc130-748b-4bad-8091-2858664299ed/

FAQ

What is CVE-2026-86783?

CVE-2026-86783 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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, allowi...

How severe is CVE-2026-86783?

CVE-2026-86783 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-86783?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.