Is CVE-2026-109989 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109989?

CVE-2026-109989 has a CVSS v3 severity of MEDIUM (6.4).

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CVE-2026-109989

Description

The Themify Popup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'popup_width_unit' parameter in all versions up to, and including, 1.4.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.