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TI-2026-16102 Aliases CVE-2026-19857GHSA-hgfq-v6h8-89x5

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

Priority MEDIUM 55CWE-74Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00229 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Formidable Forms (Unknown): 6.35

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownFormidable Forms6.34 to before 6.356.35Patch availableCNA
  • Formidable Forms VendorUnknown Affected 6.34 to before 6.35 Fixed in 6.35 Patch available CNA

Remediation

  • Fix · CNA Formidable Forms (Unknown) Fixed in 6.35

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Formidable Forms 6.35

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-58759 Formidable Forms 6.34 - Unauthenticated Stored Content Injection via 'updated_by' ParameterPriority LOW 19
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19857
  2. 2026-10-03 Alias added: GHSA-hgfq-v6h8-89x5

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences