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CVE-2026-89435VulnerabilityPublished

The Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More plugin for WordPress is

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Authoritative record:CVE-2026-89435· High 8.8

Not known to be exploited · CVSS 8.8 High · patch available : patch Formidable Forms (WordPress plugin) soon.

Data as of 30 Oct 2026, 10:29 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Wordfence)CVSS 3.18.8
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
strategy11teamFormidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form BuilderAffected
  • <=6.35
Fixed in–

AI-suggested

Users should verify with the vendor for any updates or patches. If you cannot patch yet, restrict access to users with 'frm_view_forms' capability and consider disabling or removing the Formidable Forms plugin if the free version is used. Monitor vendor advisories for official remediation guidance.

Description

The Formidable Forms WordPress plugin is vulnerable to arbitrary plugin installation via the 'file_url' parameter in versions up to and including 6.35. This vulnerability arises from insufficient validation of URL prefixes and improper permission checks that allow authenticated users with subscriber-level access or higher to install plugins without proper capabilities. Exploitation requires the site to be using the free version of the plugin (Formidable Pro is not installed).

References

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