Stored Cross-Site Scripting Vulnerability in BlockArt Blocks Plugin for WordPress
CVE-2026-3498

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Blockart Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Library
Vendor
CVE Published:
11 April 2026

What is CVE-2026-3498?

The BlockArt Blocks plugin for WordPress is susceptible to a stored cross-site scripting (XSS) flaw due to inadequate input sanitization and output escaping. This vulnerability allows authenticated attackers with Author-level permissions or higher to input malicious scripts through the 'clientId' block attribute. When a user accesses the page that has been compromised, the injected scripts are executed, potentially leading to harmful consequences such as data theft, session hijacking, or site defacement. It is crucial for users of this plugin to address this vulnerability by applying the latest patches and updates.

Affected Version(s)

BlockArt Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Library 0 <= 2.2.15

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/blockart-block...
https://plugins.trac.wordpress.org/browser/blockart-block...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Athiwat Tiprasaharn
Itthidej Aramsri
.