CVE-2026-3253

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-862
Vendor	mailerlite
Product	mailerlite – signup forms (official)
Published	Sep 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

mailerlite / MailerLite – Signup forms (official)

0 ≤ 1.7.21

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/1d845767-1e5f-43f0-9fc6-a897c2d5c3dd?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3505999/

Credits

Tarcísio Luchesi De Almeida Silva (Poystick)