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

Quick assessment

Affected
Omnisend Email Marketing for WooCommerce by Omnisend
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

omnisend email marketing for woocommerce是omnisend公司的一款电商邮件营销工具。 Omnisend Email Marketing for WooCommerce 1.18.0及之前版本存在授权问题漏洞，该漏洞源于认证机制失效，可能导致未经验证的攻击者通过网络访问破坏认证，从而造成机密性影响。

CVSS 7.5 · High EPSS 0.48% · P40

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
Omnisend Email Marketing for WooCommerce by Omnisend n/a≤ 1.18.0 affected
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I. Basic Information for CVE-2026-42668

Vulnerability Information
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Vulnerability Title
WordPress Email Marketing for WooCommerce by Omnisend plugin <= 1.18.0 - Broken Authentication vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Broken Authentication in Email Marketing for WooCommerce by Omnisend <= 1.18.0 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Omnisend Email Marketing for WooCommerce 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
omnisend email marketing for woocommerce是omnisend公司的一款电商邮件营销工具。 Omnisend Email Marketing for WooCommerce 1.18.0及之前版本存在授权问题漏洞，该漏洞源于认证机制失效，可能导致未经验证的攻击者通过网络访问破坏认证，从而造成机密性影响。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Omnisend Email Marketing for WooCommerce by Omnisend n/a ~ 1.18.0 -

II. Public POCs for CVE-2026-42668

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III. Intelligence Information for CVE-2026-42668

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Vendor Advisories for CVE-2026-42668 (1)

IV. Related Vulnerabilities

Same product: Email Marketing for WooCommerce by Omnisend
Same vendor: Omnisend
Same weakness: CWE-288

V. Comments for CVE-2026-42668

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