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CVE-2026-19857

Formidable Forms < 6.35 - Unauthenticated Arbitrary Shortcode Execution via [entry_key] Custom HTML Token

MEDIUM
4.8
CVSS Score
Published: September 16, 2026 at 06:30 AM UTC
Updated: September 16, 2026 at 08:44 PM UTC
1 product affected across 1 vendorFormidable Forms

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Formidable Forms· STRATEGY11wordpress-plugin
60%
6.34 ≤ v < 6.356.34
Affected range stops below 6.35, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

ExploitVDB EntryTechnical Description
Source: cverecord
https://wpscan.com/vulnerability/5ff439f4-aa99-4198-b908-0cf098656cf7/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMWPScan
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-74

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