How severe is CVE-2026-3498?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Wpblockart Blockart Blocks – Gutenberg Blocks, Page Builder ,Wordpress Block Plugin, Sections & Template Library

CVE-2026-3498

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (8.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Wpblockart Blockart Blocks – Gutenberg Blocks, Page Builder ,Wordpress Block Plugin, Sections & Template Library — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-3498?: CVE-2026-3498 is a medium-severity vulnerability in Wpblockart Blockart Blocks – Gutenberg Blocks, Page Builder ,Wordpress Block Plugin, Sections & Template Library, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-11.
How severe is CVE-2026-3498?: Medium severity. CVSS v3 base score is 6.4 out of 10.