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GutenKit <= 2.5.0 — Authenticated (Contributor+) Arbitrary CSS Injection

CVE-2026-19698Published · Updated

Action summary

Affected: ≤2.5.0Update to 2.5.1 or newer

All remediation steps
Watch plugin
Severity
Medium4.3
CVSS
4.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor gutenkit-blocks-addon

  1. Affected≤ 2.5.0
  2. Patched in2.5.1

Update to 2.5.1 or newer.

You are affected if you run ≤ 2.5.0. Version 2.5.1 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 2.5.1, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Haitam Lazaar.

The GutenKit plugin for WordPress is vulnerable to CSS Injection in all versions up to, and including, 2.5.0. This is due to missing capability check on the saving user before persisting CSS style settings to post meta and block attributes, and missing trust validation before rendering those settings as an inline stylesheet. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary CSS into pages served to site visitors, enabling defacement, interface redressing, and forcing external resource loads.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor

All 9
More vulnerabilities in GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor
SeverityVulnerabilityCVEPublished
Medium6.42.5.4 - Authenticated (Author+) Stored Cross-Site Scripting
2.5.0 – 2.5.4Update to 2.5.5
CVE-2026-114427
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'postBodyCss'
≤2.4.4Update to 2.4.5
CVE-2026-2573
Medium6.4Authenticated (Author+) Stored Cross-Site Scripting
<2.5.0Update to 2.5.0
CVE-2026-19697
Medium4.3Authenticated (Contributor+) Information Exposure
≤2.4.15Update to 2.5.0
CVE-2026-19699
Medium5.3Missing Authorization to Unauthenticated Sensitive Information Exposure via Mailchimp REST Endpoints
≤2.4.12Update to 2.4.13
CVE-2026-15827

Timeline

  1. CVE published

    Severity medium, CVSS 4.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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