---
id: CVE-2026-19859
title: >-
  The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request
  parameter before rendering it as message content, allowing unauthenticated
  users to execute arbitrary shortcodes registered on the site on any page
  displaying…
summary: >-
  The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request
  parameter before rendering it as message content, allowing unauthenticated
  users to execute arbitrary shortcodes registered on the site on any page
  displaying…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
published: '2026-09-06'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:09:21.310'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19859'
references:
  - url: 'https://wpscan.com/vulnerability/19c115a5-4280-4b78-a460-140ecfc78d4f/'
    label: contact@wpscan.com
tags:
  - nvd
epss: 0.00199
epssPercentile: 0.08633
ingestedAt: '2026-09-06T19:59:41.964Z'
---

## Overview

The JetFormBuilder WordPress plugin before 3.6.5.2 does not sanitize a request parameter before rendering it as message content, allowing unauthenticated users to execute arbitrary shortcodes registered on the site on any page displaying a form. Escaping is applied to that content before a later shortcode-expansion pass rather than after it, so the escaping can be bypassed.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.