CVE-2026-12400

Summary

The FlowForms – Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.1.1 via the update_form due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to modify the content, design, and settings of, as well as publish or revert, any form on the site — including forms owned by administrators — by supplying an arbitrary form ID in the REST URL.

Affected Software

Weaknesses

• CWE-639: CWE-639 Authorization Bypass Through User-Controlled Key

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/7f4e6133-f833-4da2-af4a-e7e7fcedfe3c?source=cve
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L493
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L48
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L562
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L603
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L654
• https://plugins.trac.wordpress.org/browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L694
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3577870%40flowforms&new=3577870%40flowforms

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