CVE-2026-12400Public exploitNetwork attack vector

Contributor-level form modification via unchecked REST ID

Published Jul 10, 2026 · Updated Jul 10, 2026

Authorization bypass in Priyanshu Chaudhary FlowForms 1.1.1 and earlier allows remote authenticated users to modify any site form via REST requests. The update_form REST handler accepts the form ID from /flowforms/v1/forms/{id} and updates that object after checking only edit_posts, without verifying form ownership or object-level permission. Contributor-level access is sufficient to change content, design, settings, and draft or publication state for administrator-owned forms.

CVSS severity4.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Priyanshu Chaudhary FlowForms 1.1.1 and earlier allows remote authenticated users to modify any site form via REST requests. The update_form REST handler accepts the form ID from /flowforms/v1/forms/{id} and updates that object after checking only edit_posts, without verifying form ownership or object-level permission. Contributor-level access is sufficient to change content, design, settings, and draft or publication state for administrator-owned forms.

The record

CVE
CVE-2026-12400
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Priyanshu Chaudhary
Product
FlowForms
Classifications
CWE-639, T1565.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Priyanshu Chaudhary · FlowFormsversion=0 <=1.1.1

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.003Web Site Defacement

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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