Cross-Site Scripting Vulnerability in Kirki WordPress Plugin
CVE-2026-84219

7.5HIGH

Key Information:

Vendor

WordPress
Status
Kirki
Vendor
CVE Published:
6 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-84219?

The Kirki WordPress plugin prior to version 6.3.0 is vulnerable to a cross-site scripting security flaw. This vulnerability allows unauthenticated users to store malicious JavaScript code in comments. When a page displaying these comments is viewed, the code executes in the context of any user visiting the site, including administrators. This exploitation can occur on every page where the site's header or footer is set to display comments, potentially leading to widespread user compromise.

Affected Version(s)

Kirki 6.2.1 < 6.3.0

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-2026-84219 - Proof of Concept

References

https://wpscan.com/vulnerability/e95bd1e3-6f61-423f-add6-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jakub Herman
WPScan
.