Is CVE-2026-19859 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-19859?

CVE-2026-19859 has a CVSS v3 severity of MEDIUM (6.5).

Back

CVE-2026-19859

Description

The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request parameter before rendering it as message content, allowing unauthenticated users to execute arbitrary shortcodes registered on the site on any page displaying a form. Escaping is applied to that content before a later shortcode-expansion pass rather than after it, so the escaping can be bypassed.