WP Mail Gateway <= 1.8 - Missing Authorization to Authenticated (Subscriber+) SMTP Configuration Modification via 'wmg_save_provider_config' AJAX Action

Wordfence Intelligence   >   Vulnerability Database   >   WP Mail Gateway <= 1.8 - Missing Authorization to Authenticated (Subscriber+) SMTP Configuration Modification via 'wmg_save_provider_config' AJAX Action
8.8
Missing Authorization
CVE CVE-2026-6963
CVSS 8.8 (High)
Publicly Published May 1, 2026
Last Updated May 2, 2026
Researcher Nabil Irawan - Heroes Cyber Security

Description

The WP Mail Gateway plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the wmg_save_provider_config AJAX action in all versions up to, and including, 1.8. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update SMTP settings and redirect mail which can be used for privilege escalation by triggering a password reset email and using that to access and administrator's account.

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Vulnerability Details for WP Mail Gateway

WP Mail Gateway

Software Type Plugin
Software Slug wp-mail-gateway (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.8.1, or a newer patched version
Affected Version
  • <= 1.8
Patched Version
  • 1.8.1

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