CVE-2026-13153

Essential Blocks <= 6.3.0 - Unauthenticated Information Exposure

2026-08-03 00:00

Strategic Overview

Status: Patched in 6.4.0
Affected Plugin: Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
Affected Version: <= 6.3.0
CVSS: 5.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2026-13153

View all Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns vulnerabilities

At a glance

CVE-2026-13153 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Gutenberg Essential Blocks WordPress plugin, affecting versions <= 6.3.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 6.4.0; sites on affected versions should update now. Disclosed August 2026, reported by Revanth Hari Narayana Matte.

Vulnerability Overview

The Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 6.3.0. This makes it possible for unauthenticated attackers to extract sales data.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Gutenberg Essential Blocks <= 6.3.0 takes no account at all. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Gutenberg Essential Blocks the fix is 6.4.0: builds <= 6.3.0 are affected, anything from 6.4.0 onward is not.

Remediation

Update to version 6.4.0, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Gutenberg Essential Blocks 6.4.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13153 https://www.wordfence.com/threat-intel/vulnerabilities/id/61bbf0a0-7ba7-450c-9270-1000a8f46eca https://nvd.nist.gov/vuln/detail/CVE-2026-13153

Related records

Same weakness class

5.3CVE-2026-13154: Essential Blocks <= 6.3.0 Information ExposureCVE-2026-13154

Other vulnerabilities in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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