XSS in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor

CVE-2026-104762

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Block Font Family Attribute in all versions up to, and including, 3.7.12 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. This encoding bypass is only triggered when the "Load Google Fonts Locally" site option (kadence_blocks_font_settings['load_fonts_local']) is enabled, which is not the default configuration.

Vulnerability class: XSS (Cross-Site Scripting)

Published .

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.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-104762?
CVE-2026-104762 is a medium-severity vulnerability in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-10.
How severe is CVE-2026-104762?
Medium severity. CVSS v3 base score is 6.4 out of 10.