---
id: CVE-2026-3253
title: >-
  The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to
  unauthorized modification of data due to a missing capability check on the
  forms() method of the AdminController class in all versions up to, and
  including, 1…
summary: >-
  The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to
  unauthorized modification of data due to a missing capability check on the
  forms() method of the AdminController class in all versions up to, and
  including, 1…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: mailerlite
product: MailerLite – Signup forms (official)
affected:
  - signup_forms_official <= 1.7.21
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T15:17:21.977'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3253'
references:
  - url: 'https://plugins.trac.wordpress.org/changeset/3505999/'
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/1d845767-1e5f-43f0-9fc6-a897c2d5c3dd?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T14:33:53.170720Z'
ingestedAt: '2026-09-24T11:42:06.845Z'
---

## Overview

The MailerLite – Signup forms (official) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the forms() method of the AdminController class in all versions up to, and including, 1.7.21. This makes it possible for authenticated attackers, with Contributor-level access and above, to create or delete arbitrary signup forms.

## Remediation

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