What is CVE-2026-4658?

CVE-2026-4658 is a medium-severity vulnerability in Wpdevteam Gutenberg Essential Blocks – Page Builder For & Patterns, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-02.

How severe is CVE-2026-4658?

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

XSS in Wpdevteam Gutenberg Essential Blocks – Page Builder For & Patterns

CVE-2026-4658

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the className, classHook, and blockId attributes in the Add to Cart block (essential-blocks/ad…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.2th 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

Wpdevteam Gutenberg Essential Blocks – Page Builder For & Patterns — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-4658?: CVE-2026-4658 is a medium-severity vulnerability in Wpdevteam Gutenberg Essential Blocks – Page Builder For & Patterns, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-02.
How severe is CVE-2026-4658?: Medium severity. CVSS v3 base score is 6.4 out of 10.