---
id: CVE-2026-103911
title: >-
  Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via
  's' Search Parameter and Anonymous Comment via render_block
summary: >-
  The The Forminator Forms – Contact Form, Payment Form & Custom Form Builder
  plugin for WordPress is vulnerable to arbitrary shortcode execution in all
  versions up to, and including, 1.58.1. This is due to the software allowing
  users to e…
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'
cvssSource: cna
cwe:
  - CWE-94
vendor: wpmudev
product: 'Forminator Forms – Contact Form, Payment Form & Custom Form Builder'
affected:
  - forminator_forms_contact_form_payment_form_custom_form_builder <= 1.58.1
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T04:27:02.364Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-103911'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/9d922a8f-611f-4586-b8ba-72d18d11a975?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/class-core.php#L290
  - url: >-
      https://plugins.trac.wordpress.org/browser/forminator/tags/1.57.3/library/class-core.php#L167
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3745883%40forminator&new=3745883%40forminator
tags:
  - cve.org
ingestedAt: '2026-10-16T04:58:47.490Z'
---

## Overview

The The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 1.58.1. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. This is exploitable on any block-theme install via a single unauthenticated GET request to the search results page, or by submitting an anonymous comment on any post with comments enabled; no Forminator-specific content or configuration is required to trigger execution.

## Affected

- `forminator_forms_contact_form_payment_form_custom_form_builder <= 1.58.1`

## Remediation

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