CVE-2026-19858

JetFormBuilder — Dynamic Blocks Form Builder < 3.6.5.2 - Unauthenticated Information Exposure

2026-09-07 00:00

Strategic Overview

Status: Patched in 3.6.5.2
Affected Plugin: JetFormBuilder — Dynamic Blocks Form Builder
Affected Version: < 3.6.5.2
CVSS: 5.3Medium
Weakness type: CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE: CVE-2026-19858

View all JetFormBuilder — Dynamic Blocks Form Builder vulnerabilities

At a glance

CVE-2026-19858 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the JetFormBuilder WordPress plugin, affecting versions < 3.6.5.2. 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 3.6.5.2; sites on affected versions should update now. Disclosed September 2026, reported by Jakub Herman.

Vulnerability Overview

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to 3.6.5.2. This makes it possible for unauthenticated attackers to extract sensitive user or configuration data.

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-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in JetFormBuilder < 3.6.5.2 takes no account at all. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For JetFormBuilder the fix is 3.6.5.2: builds < 3.6.5.2 are affected, anything from 3.6.5.2 onward is not.

Remediation

Update to version 3.6.5.2, 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 3.6.5.2 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-19858 https://www.wordfence.com/threat-intel/vulnerabilities/id/7f48ee6c-147b-4461-ae45-fe10a930f036 https://nvd.nist.gov/vuln/detail/CVE-2026-19858

Related records

Other vulnerabilities in JetFormBuilder — Dynamic Blocks Form Builder

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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