CVE-2026-75908
Received Received - Intake

Authorization Bypass in WordPress Newsletters Plugin

Publication date: 2026-08-25

Last updated on: 2026-08-25

Assigner: Wordfence

Description
The Newsletters plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.17. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with author-level access and above, to send arbitrary newsletter emails to users of any WordPress role, including administrators, by forging POST fields during a normal post submission. This allows an attacker-supplied role slug via the newsletters_mailinglistsroles POST field to be passed directly to get_users(), enabling unauthorized mass-mailing and potential phishing against privileged site users through the site's own outbound email channel.

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Meta Information

Published
2026-08-25
Last Modified
2026-08-25
Generated
2026-08-25
AI Q&A
2026-08-25
EPSS Evaluated
N/A
NVD
CVE-2026-75908
EUVD
EUVD-2026-65464

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wordfence newsletters_plugin to 4.17 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

The Newsletters plugin for WordPress has an authorization bypass flaw in versions up to 4.17. Authenticated attackers with author-level access or higher can send arbitrary newsletter emails to any user role, including administrators, by manipulating POST fields during a normal post submission. This is done by forging the newsletters_mailinglistsroles field to pass an attacker-supplied role slug to get_users(), enabling unauthorized mass-mailing and potential phishing via the site's email system.

Detection Guidance

Check WordPress plugin versions for the Newsletters plugin up to 4.17. Inspect server logs for unusual POST requests to newsletter-related endpoints, especially those modifying mailing list roles. Look for unauthorized email sends from author-level users or above.

Impact Analysis

If you use the vulnerable Newsletters plugin, attackers could send phishing emails to you or other users on your WordPress site, including administrators. This could lead to unauthorized access, data breaches, or malware distribution. The attack requires only author-level access, making it easier for attackers to exploit.

Compliance Impact

This vulnerability could lead to unauthorized data exposure or phishing attacks, which may violate GDPR (data protection) or HIPAA (health data privacy) requirements. Unauthorized access or data leaks could result in regulatory fines or legal consequences due to non-compliance with security and privacy standards.

Mitigation Strategies

Update the Newsletters plugin to the latest version beyond 4.17. Remove author-level access for users unless absolutely necessary. Monitor outbound emails for suspicious activity and restrict user roles to minimize attack surface.

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