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Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.1 — Authenticated (Contributor+) Stored Cross-Site Scripting

CVE-2024-1854Published · Updated

Action summary

Affected: ≤4.5.1Update to 4.5.2 or newer

All remediation steps
Watch plugin
Severity
Medium6.4
CVSS
6.4
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-20 Improper Input Validation
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns essential-blocks

  1. Affected≤ 4.5.1
  2. Patched in4.5.2

Update to 4.5.2 or newer.

You are affected if you run ≤ 4.5.1. Version 4.5.2 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 4.5.2, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Ngô Thiên An (ancorn_), Dau Hoang Tai.

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the blockId parameter in all versions up to, and including, 4.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor access or higher, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns

All 34
More vulnerabilities in Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns
SeverityVulnerabilityCVEPublished
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'marker' Attribute
≤6.4.5Update to 6.4.6
CVE-2026-96256
Medium5.3Unauthenticated Information Exposure
≤6.3.0Update to 6.4.0
CVE-2026-13154
Medium5.3Unauthenticated Information Exposure
≤6.3.0Update to 6.4.0
CVE-2026-13153
Medium6.4Page Builder for Gutenberg Blocks & Patterns <= 6.1.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'configurablePrefix' Block Attribute
≤6.1.4Update to 6.2.0
CVE-2026-10833
High7.2Authenticated (Author+) Server-Side Request Forgery
≤6.1.3Update to 6.1.4
CVE-2026-10586

Timeline

  1. CVE published

    Severity medium, CVSS 6.4

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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