CVE-2026-3498
BlockArt Blocks <= 2.2.15 - Authenticated (Author+) Stored Cross-Site Scripting via 'clientId' Block Attribute
- State
- Published
- Severity
- 6.4 Medium
- Published
- Apr 11, 2026
- Updated
- Apr 13, 2026
- Reserved
- Mar 3, 2026
Description
The BlockArt Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'clientId' block attribute in all versions up to, and including, 2.2.15. This is due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
BlockArt Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Librarywpblockart |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/7d0cb432-785a-4f38-830f-72b95e65aa5a?source=cve
- https://plugins.trac.wordpress.org/browser/blockart-blocks/tags/2.2.15/includes/BlockTypes/QueryLoop.php#L43
- https://plugins.trac.wordpress.org/browser/blockart-blocks/tags/2.2.15/includes/BlockTypes/PostTemplate.php#L67
- https://plugins.trac.wordpress.org/changeset?old_path=%2Fblockart-blocks/tags/2.2.15&new_path=%2Fblockart-blocks/tags/2.3.0
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