CVE-2026-19857
The Formidable Forms WordPress plugin before 6.35 does not prevent a request-derived value from reaching the WordPress shortcode parser when it substitutes a supported token into a form's custom HTML, allowing unauthenticated visitors to have arbitrary shortcodes, with attacker-chosen attributes, executed server-side on any page displaying an affected form.
- Published Sep 16, 2026
- CVSS 4.8 medium
- 0.2% chance of exploitation in the next 30 days (EPSS)
- A fix is available