Security Flaw in Gutenberg Essential Blocks Plugin Exposing Custom Post Types
CVE-2026-13154

Currently unrated

Key Information:

Vendor

WordPress
Status
Gutenberg Essential Blocks
Vendor
CVE Published:
6 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13154?

The Gutenberg Essential Blocks plugin for WordPress before version 6.4.0 contains a significant access control vulnerability. It fails to properly verify whether an attacker-supplied post type is publicly viewable prior to executing queries in its public REST routes. This oversight allows unauthenticated users to access and read published entries of custom post types that should be restricted from public visibility, thereby exposing sensitive data that website administrators intended to keep private.

Affected Version(s)

Gutenberg Essential Blocks 0 < 6.4.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-13154 - Proof of Concept

References

https://wpscan.com/vulnerability/ab60ebee-c8b5-4bba-8138-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muni Nitish Kumar Yaddala
WPScan
.