CVE-2026-42668 HIGH

CVE-2026-42668: WordPress Email Marketing for WooCommerce by Omnisend plugin <= 1.18.0 - Broken Authentication vulnerability

Vendor Omnisend

Product Email Marketing for WooCommerce by Omnisend

Weakness CWE-288

Published June 15, 2026

Last update June 16, 2026

View on NVD All CVEs

CVSS base score

7.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity None

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated Broken Authentication in Email Marketing for WooCommerce by Omnisend <= 1.18.0 versions.

Explanation of Vulnerability in Simple Terms

02Summary

The Omnisend Email Marketing for WooCommerce plugin through version 1.18.0 contains an authentication bypass vulnerability. An attacker can read sensitive data without valid credentials by exploiting improper authentication checks. The vulnerability requires only network access and no user interaction. Site administrators should update to a version newer than 1.18.0 when available.

What an attacker can do

03Attacker Capabilities

Read sensitive data from the site without providing valid login credentials.

Potential impact on your site

04Site Impact

Attackers can access confidential information stored by the Omnisend plugin without logging in.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

June 16, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-42668 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/288.html AskarLabs — CWE-288 write-up Authentication Bypass Using an Alternate Path or Channel

Related vulnerabilities

Identifiers

CVE CVE-2026-42668

CWE CWE-288

CVSS 7.5 / HIGH

Affected versions