CVE-2026-39713 MEDIUM

CVE-2026-39713: WordPress Mailercloud – Integrate webforms and synchronize website contacts plugin <= 1.0.7 - Broken Access Control vulnerability

Vendor Mailercloud
Product Mailercloud – Integrate webforms and synchronize website contacts
Weakness CWE-862 · Missing authorization
Published April 8, 2026
Last update April 29, 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

Missing Authorization vulnerability in mailercloud Mailercloud – Integrate webforms and synchronize website contacts mailercloud-integrate-webforms-synchronize-contacts allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Mailercloud – Integrate webforms and synchronize website contacts: from n/a through <= 1.0.7.

Explanation of Vulnerability in Simple Terms

02Summary

Mailercloud versions up to 1.0.7 lack proper authorization checks, allowing unauthenticated attackers to modify data through the web form integration. The vulnerability requires no user interaction and is remotely exploitable over the network. Site administrators should update to a version newer than 1.0.7 to restore access controls.

What an attacker can do

03Attacker Capabilities

Modify data in the Mailercloud integration without authentication.

Potential impact on your site

04Site Impact

Unauthorized changes to web form data and contact synchronization settings.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

April 8, 2026 CVE published
April 29, 2026 Record updated

Related vulnerabilities

08Related CVE