CVE-2026-16974: Themeum Kirki – Freeform Page Builder, Website Builder & Customizer

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post_meta Shortcode in all versions up to, and including, 6.2.0 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 products

• Themeum Kirki – Freeform Page Builder, Website Builder & Customizer: up to and including 6.2.0

Published 2026-08-11. Last modified 2026-08-12.