Description
The Cozy Blocks – Website Builder for WordPress Block Editor | Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content (block attribute icon.view / icon.layout / icon.gap)' parameter in all versions up to, and including, 2.2.27 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Although wp_kses_post is applied on save, it does not neutralize a quote-only attribute-breakout payload containing no '<' character, leaving the block comment and its decoded JSON attributes intact and exploitable at render time.
References7
- plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.27/bloc…
- plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.27/bloc…
- plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.27/bloc…
- plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.27/bloc…
- plugins.trac.wordpress.org/browser/cozy-addons/tags/2.2.27/bloc…
- plugins.trac.wordpress.org/changeset?reponame=&old=3752142%40co…
- www.wordfence.com/threat-intel/vulnerabilities/id/f4041795-8131…
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 10 · as of 3 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.