CVE-2026-12400 json
FlowForms <= 1.1.1 - Authenticated (Contributor+) Insecure Direct Object Reference to Arbitrary Form Modification via REST API '/flowforms/v1/forms/{id}' Endpoints
published 2026-07-10 4 mo ago modified 2026-07-14 3 mo ago also EUVD-2026-42847
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- priyanshuchaudhary FlowForms – Conversational Form Builder
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/7f4e6133-f833-4da2-af4a-e7e7fcedfe3c?source=cve
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L493
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L48
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L562
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L603
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L654
- plugins.trac.wordpress.org /browser/flowforms/tags/1.1.1/includes/class-rest-api.php#L694
- plugins.trac.wordpress.org /changeset?reponame=&old=3577870%40flowforms&new=3577870%40flowforms
Sources
- CVE List CVE-2026-12400
- NVD CVE-2026-12400
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.