CVE-2026-2573: GutenKit <= 2.4.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'postBodyCss'
The GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘postBodyCss’ parameter in all versions up to, and including, 2.4.4 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPressto a version that resolves this vulnerability.Fixed in 2.4.4
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs an authenticated WordPress account with at least Contributor-level access. They can inject script through the postBodyCss parameter.
When does the injected script run, and who may be affected?
The script executes whenever a user accesses a page containing the injected content. This can affect any user who visits that page, including higher-privileged WordPress users.
Which installations are affected?
All GutenKit versions up to and including 2.4.4 are affected. The provided data does not identify a fixed version.