JetFormBuilder <= 3.6.2 - Missing Authorization to Unauthenticated JetEngine Options Page Modification

2026-09-03 00:00
andrea bocchetti

Strategic Overview

Status
Patched in 3.6.2.1
Affected Plugin
JetFormBuilder — Dynamic Blocks Form Builder
Affected Version
<= 3.6.2
CVSS
5.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE pending
View all JetFormBuilder — Dynamic Blocks Form Builder vulnerabilities

At a glance

This record tracks a medium-severity Missing Authorization vulnerability in the JetFormBuilder WordPress plugin, affecting versions <= 3.6.2. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.6.2.1; sites on affected versions should update now. Disclosed September 2026, reported by andrea bocchetti.

Vulnerability Overview

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'do_action' function in the 'Update_Options' action class in all versions up to, and including, 3.6.2. This makes it possible for unauthenticated attackers to modify JetEngine Options Page values when an administrator has configured a form with the "Update Options" post-submission action. The vulnerability requires that both JetFormBuilder and JetEngine are installed and active, and that an administrator has specifically configured a form with the Update Options action.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

JetFormBuilder <= 3.6.2 carries this weakness at do_action, and reaching it takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For JetFormBuilder the fix is 3.6.2.1: builds <= 3.6.2 are affected, anything from 3.6.2.1 onward is not.

Remediation

Update to version 3.6.2.1, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: JetFormBuilder 3.6.2.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/b0fe7d29-118f-42fb-9e48-6217faaa689b

Related records

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