Subscriber Broken Access Control in Email Marketing for WooCommerce

Executive Summary

CVE-2026-57632 is a Broken Access Control vulnerability in the WordPress plugin "Email Marketing for WooCommerce by Omnisend" versions 1.19.0 and below.

Broken Access Control means that the plugin lacks proper authorization checks, allowing unprivileged users to perform actions that should require higher privileges.

This vulnerability allows attackers to bypass restrictions and potentially manipulate or access features they should not have access to.

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Detection Guidance

The vulnerability CVE-2026-57632 affects the WordPress plugin "Email Marketing for WooCommerce by Omnisend" versions 1.19.0 and below. Detection primarily involves verifying the plugin version installed on your WordPress site.

To detect if your system is vulnerable, check the installed plugin version and confirm if it is 1.19.0 or lower. If so, the system is vulnerable to broken access control issues.

Suggested commands to check the plugin version on your server include:

• Using WP-CLI: wp plugin list | grep omnisend
• Manually checking the plugin's readme or main PHP file for the version number, e.g., cat wp-content/plugins/omnisend-connect/readme.txt | grep "Stable tag"
• Alternatively, check the plugin version from the WordPress admin dashboard under Plugins.

If the plugin version is vulnerable, immediate action such as updating to version 1.19.1 or later is recommended.

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Impact Analysis

Exploiting this vulnerability could allow attackers to perform unauthorized actions within the affected plugin on your website.

Since the plugin is used for email marketing in WooCommerce, attackers might manipulate marketing data or disrupt email campaigns.

The vulnerability has a moderate severity with a CVSS score of 5.4, indicating a noticeable impact but not critical.

Thousands of websites could be targeted, so it is important to update the plugin to version 1.19.1 or later to mitigate the risk.

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Compliance Impact

The provided information does not specify any direct impact of the CVE-2026-57632 vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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Mitigation Strategies

To mitigate the CVE-2026-57632 vulnerability in the Email Marketing for WooCommerce by Omnisend plugin, you should immediately update the plugin to version 1.19.1 or later.

If you are using Patchstack, you can enable auto-updates for vulnerable plugins to ensure timely patching.

Alternatively, seek assistance from your hosting provider or a developer to apply the necessary updates or mitigations.

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