# CVE-2026-15333: Cozy Blocks WordPress plugin stored XSS in cozyCustomFont attribute

Source: https://junglewise.ai/threats/cve-2026-15333-cozy-blocks-wordpress-plugin-stored-xss-in-cozycustomfont  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-24. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-15333 · Severity: medium · CVSS 6.4 · Published 2026-07-24

Cozy Blocks is a WordPress plugin used to design websites with custom layouts and templates. A security flaw allows users with basic editing permissions to hide malicious scripts inside page design elements. When other users or visitors view the affected page, these scripts can execute, potentially leading to unauthorized actions or data theft.

Technologies: [CozyThemes Cozy Blocks](https://junglewise.ai/threats/technologies/cozy-blocks). Vendors: [CozyThemes](https://junglewise.ai/threats/vendors/cozythemes).

## Quick answers

**Is CVE-2026-15333 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15333 being exploited in the wild.

**How severe is CVE-2026-15333?** Medium severity, with a CVSS score of 6.4, published 24 July 2026.

**Which products and versions are affected?** CozyThemes Cozy Blocks <= 2.2.11.

**Is there a fix for CVE-2026-15333?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-15333 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-15333?** Check whether you run CozyThemes Cozy Blocks at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Cozy Blocks plugin for WordPress fails to sufficiently sanitize and escape the 'cozyCustomFont' block attribute, leading to a Stored Cross-Site Scripting (XSS) vulnerability. Authenticated attackers with contributor-level permissions or higher can exploit this by injecting arbitrary web scripts into the block's metadata. These scripts execute in the browser of any user who views the compromised page. The vulnerability exists in all versions up to and including 2.2.11. A patch or update should be applied to address the improper neutralization of input during web page generation (CWE-79).

## Affected products

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

## Timeline

- 2026-07-24: disclosed
- 2026-07-24: advisory

## References

- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)
- [https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php](https://plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.11/includes/functions.php)

## Related threats

- [CozyThemes Cozy Blocks stored cross-site scripting](https://junglewise.ai/threats/cve-2026-24533-improper-neutralization-of-input-during-web-page-generation-cross)
- [CozyThemes Cozy Blocks insecure direct object reference in cozy-addons](https://junglewise.ai/threats/cve-2026-97070-authorization-bypass-through-user-controlled-key-vulnerability-in)
- [Cozy Blocks WordPress plugin Stored XSS in layoutCircle.alignment](https://junglewise.ai/threats/cve-2026-15950-cozy-blocks-wordpress-plugin-stored-xss-in-layoutcircle-alignment)
- [Cozythemes Cozy Blocks Stored XSS in postMeta.font.size attribute](https://junglewise.ai/threats/cve-2026-15393-cozythemes-cozy-blocks-stored-xss-in-postmeta-font-size-attribute)
- [CozyThemes Cozy Blocks Stored XSS in icon.view attribute](https://junglewise.ai/threats/cve-2026-15334-cozythemes-cozy-blocks-stored-xss-in-icon-view-attribute)