CVE-2026-119183

JetFormBuilder <= 3.6.8 - Unauthenticated Stored Cross-Site Scripting via '%META::key%' Macro via Post Meta

2026-11-06 21:48
Mohamed Amgad Khater (mamgad)

Strategic Overview

Status
Patched in 3.6.8.1
Affected Plugin
JetFormBuilder — Dynamic Blocks Form Builder
Affected Version
<= 3.6.8
CVSS
7.2High
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation
CVE
CVE-2026-119183
View all JetFormBuilder — Dynamic Blocks Form Builder vulnerabilities

At a glance

CVE-2026-119183 is a high-severity Improper Neutralization of Input During Web Page Generation vulnerability in the JetFormBuilder WordPress plugin, affecting versions <= 3.6.8. It carries a CVSS score of 7.2 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.6.8.1; sites on affected versions should update now. Disclosed November 2026, reported by Mohamed Amgad Khater (mamgad).

Vulnerability Overview

The JetFormBuilder — Dynamic Blocks Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '<form field mapped to a post meta key, e.g. lst_cost>' parameter in all versions up to, and including, 3.6.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the target site to have configured a public Insert Post form writing to a post meta key and a Calculated Field whose formula references that key via the %META::key% macro, after which a single unauthenticated POST is sufficient to persist the payload.

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-79: Improper Neutralization of Input During Web Page Generation

Reaching this weakness in JetFormBuilder <= 3.6.8 takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For JetFormBuilder the fix is 3.6.8.1: builds <= 3.6.8 are affected, anything from 3.6.8.1 onward is not.

Remediation

Update to version 3.6.8.1, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: JetFormBuilder 3.6.8.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-119183https://www.wordfence.com/threat-intel/vulnerabilities/id/3b3d2e0d-ce2a-48cd-a36f-92979335fd71https://nvd.nist.gov/vuln/detail/CVE-2026-119183

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C