Stored Cross-Site Scripting in GutenKit Plugin for WordPress
CVE-2026-2573

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Gutenkit – Page Builder Blocks, Patterns, And Templates For Gutenberg Block Editor
Vendor
CVE Published:
3 September 2026

What is CVE-2026-2573?

The GutenKit plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability through the 'postBodyCss' parameter. This flaw arises from inadequate input sanitization and output escaping, allowing authenticated users with Contributor-level access or greater to insert arbitrary web scripts. Such scripts can be executed when other users view affected pages, potentially compromising site integrity and user data.

Affected Version(s)

GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor 0 <= 2.4.4

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3468273/gute...

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

Athiwat Tiprasaharn (Jitlada)
Itthidej Aramsri (Boeing777)
.