CVE-2026-18437 MEDIUM

CVE-2026-18437: MailPress <= 1.5.0 - Missing Authorization to Unauthenticated Contact Updates

Vendor Mailerpress
Product MailerPress – Newsletter, email marketing & AI automation
Weakness CWE-862 · Missing authorization
Published July 31, 2026
Last update July 31, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The MailerPress – Newsletter, email marketing & AI automation plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the `mailerpress/v1/contact` endpoint in all versions up to, and including, 1.5.0. This makes it possible for unauthenticated attackers to update contact details.

Explanation of Vulnerability in Simple Terms

02Summary

MailerPress versions up to 1.5.0 lack proper authorization checks, allowing unauthenticated attackers to modify data on the site. The vulnerability requires only network access and no user interaction. An attacker can alter information without needing valid credentials or admin privileges.

What an attacker can do

03Attacker Capabilities

Modify site data without authentication or admin access.

Potential impact on your site

04Site Impact

Unauthorized changes to site content or settings via MailerPress without any user action.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

July 31, 2026 CVE published

Related vulnerabilities

08Related CVE