Arbitrary CSS Injection Vulnerability in GutenKit WordPress Plugin
CVE-2026-19698

3.5LOW

Key Information:

Vendor

WordPress
Status
Gutenkit
Vendor
CVE Published:
2 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19698?

The GutenKit WordPress plugin has a vulnerability that allows users with Contributor roles and above to inject arbitrary CSS into posts. This vulnerability arises from the plugin's failure to validate or sanitize style settings before incorporating them into the CSS rendered on the front end. While this limitation prevents JavaScript execution, it can lead to visual alterations on the page, enabling defacement and interface manipulation, thereby compromising the integrity of the user experience and the website’s appearance.

Affected Version(s)

GutenKit 0 < 2.5.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19698 - Proof of Concept

References

https://wpscan.com/vulnerability/0e6cd37e-3004-498d-8d8d-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
3.5
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Haitam Lazaar
WPScan
.