Stored Cross-Site Scripting Vulnerability in Cozy Blocks Plugin for WordPress
CVE-2026-15393

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Cozy Blocks – Page Builder For Gutenberg Editor & Fse With 600+ Patterns, 58 Blocks & Templates
Vendor
CVE Published:
28 July 2026

What is CVE-2026-15393?

The Cozy Blocks plugin, designed for WordPress, is prone to a Stored Cross-Site Scripting vulnerability due to insufficient sanitization of the 'postMeta.font.size' block attribute. This issue affects all versions up to and including 2.2.11. Authenticated attackers with contributor-level access or higher can exploit this vulnerability to inject arbitrary web scripts into pages. The injected scripts will execute whenever a user visits the affected page, potentially compromising user data and site integrity.

Affected Version(s)

Cozy Blocks – Page Builder for Gutenberg Editor & FSE with 600+ Patterns, 58 Blocks & Templates 0 <= 2.2.11

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/cozy-addons/ta...
https://plugins.trac.wordpress.org/browser/cozy-addons/ta...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.