CVE-2026-3253

MailerLite – Signup forms (official) <= 1.7.21 - Missing Authorization to Authenticated (Contributor+) Form Creation and Deletion

Published Sep 24, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mailerlite
Mailerlite mailerlite Signup Forms
Wordpress-extensions
Wordpress-extensions mailerlite-signup Forms
Vendors & Products Mailerlite
Mailerlite mailerlite Signup Forms
Wordpress-extensions
Wordpress-extensions mailerlite-signup Forms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title MailerLite – Signup forms (official) <= 1.7.21 - Missing Authorization to Authenticated (Contributor+) Form Creation and Deletion
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Sep 24, 2026, 2:34 PM
Reserved
Feb 26, 2026, 11:29 AM
Status
Deferred
Published
Sep 24, 2026, 12:17 PM
Modified
Sep 24, 2026, 3:17 PM