---
id: CVE-2026-19860
title: >-
  The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before
  3.6.5.3 does not sufficiently restrict which PHP functions can be used as a
  custom field-validation callback, relying on a blocklist that omits a
  file-deletion func…
summary: >-
  The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before
  3.6.5.3 does not sufficiently restrict which PHP functions can be used as a
  custom field-validation callback, relying on a blocklist that omits a
  file-deletion func…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L'
cwe:
  - CWE-73
product: JetFormBuilder — Dynamic Blocks Form Builder
affected:
  - jetformbuilder_dynamic_blocks_form_builder >= 3.5.6.2 < 3.6.5.3
published: '2026-09-19'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T13:34:57.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19860'
references:
  - url: 'https://wpscan.com/vulnerability/d73d8d27-6dad-4a7f-bf51-f5fc18ebc81f/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.00226
epssPercentile: 0.11905
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-19T13:15:37.351861Z'
ingestedAt: '2026-09-19T06:59:13.118Z'
---

## Overview

The JetFormBuilder — Dynamic Blocks Form Builder WordPress plugin before 3.6.5.3 does not sufficiently restrict which PHP functions can be used as a custom field-validation callback, relying on a blocklist that omits a file-deletion function, allowing users able to manage forms to cause arbitrary files on the server to be deleted. The deletion itself is carried out when the form is submitted, which requires no authentication.

## Remediation

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