CVE-2024-4891 - CVE House

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Status published Medium CVE-2024-4891

Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.12 - Authenticated (Contributor+) Stored Cross-Site Scripting

6.4 CVSS

Vulnerability Description

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in versions up to, and including, 4.5.12 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

João Pedro S Alcântara (Kinorth)

References

More from wpdevteam

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Essential Addons for Elementor – Popular Elementor Templates and Widgets <= 6.2.2 - Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting via 'data-gallery-items'

BetterDocs <= 4.1.1 - Missing Authorization to Private And Password-Protected Posts Information Disclosure

Essential Addons for Elementor – Popular Elementor Templates and Widgets <= 6.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via `Calendar` And `Business Reviews` Widgets

Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 5.4.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Slider and Post Carousel Widgets

Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 5.3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting

Affected Vendor

wpdevteam

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Affected Software

Gutenberg Essential Blocks – Page Builder for Gutenberg Blocks & Patterns

Vulnerable Versions:

0

Timeline

Official Publish: May 18th, 2024

Last Modified: April 8th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement