How severe is CVE-2026-6378?

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

XSS in Ckp267 Maxiblocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites

CVE-2026-6378

The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `/wp-json/maxi-blocks/v1.0/style-card` REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and outpu…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (22.2th 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

Ckp267 Maxiblocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-6378?: CVE-2026-6378 is a medium-severity vulnerability in Ckp267 Maxiblocks Builder | 17,000+ Design Assets, Patterns, Icons & Starter Sites, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-02.
How severe is CVE-2026-6378?: Medium severity. CVSS v3 base score is 6.4 out of 10.