PT-2025-8684 · WordPress · The Essential Blocks – Page Builder Gutenberg Blocks

D.Sim + 1 · Published 2025-02-26 · Updated 2025-02-26 · CVE-2024-13803

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress versions up to, and including, 5.2.3

Description The issue is related to Stored Cross-Site Scripting due to insufficient input sanitization and output escaping, specifically via the data-marker parameter. This allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts in pages, which will execute when a user accesses an injected page.

Recommendations For versions up to, and including, 5.2.3, update to a version that addresses the insufficient input sanitization and output escaping issue to prevent Stored Cross-Site Scripting attacks. As a temporary workaround, consider restricting access to the data-marker parameter to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2024-13803

Affected Products

The Essential Blocks – Page Builder Gutenberg Blocks

References · 6

• https://osv.dev/vulnerability/CVE-2024-13803 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-13803 · Security Note
• https://plugins.trac.wordpress.org/changeset/3242493 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/efdeca40-e021-478f-af75-c5566ae70735?source=cve · Note
• http://localhost:1337/wp-content/plugins/essential-blocks/assets/admin/editor/editor.js · Note
• https://twitter.com/CVEnew/status/1894867683956662453 · Twitter Post