CVE-2026-84219: Unknown Kirki

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

The Kirki WordPress plugin before 6.3.0 does not hold back every spelling of the HTML entities it decodes when rendering, allowing unauthenticated users to store JavaScript in a comment which then runs in the session of anyone viewing a page that displays it, including an administrator, and on every page of the site when its header or footer is built to show comments.

Affected products

• Unknown Kirki: from 6.2.1, before 6.3.0 (fixed in 6.3.0)

Published 2026-09-06. Last modified 2026-09-08.