CVE-2026-19857
Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Custom HTML Token
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | formidable forms |
| Published | Sep 16, 2026 |
Stay Ahead of the Next One
Get instant alerts for unknown formidable forms
Be the first to know when new medium vulnerabilities affecting unknown formidable forms are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Unknown / Formidable Forms
6.34 < 6.35
References
Credits
Jakub Herman WPScan