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The YayMail - WooCommerce Email Customizer plugin for WordPress is vulnerable to unauthorized plugin installation and activation due to missing capability checks on the 'yaymail_install_yaysmtp' AJAX action and `/yaymail/v1/addons/activate` REST endpoint in all versions up to, and including, 4.3.2. This makes it possible for authenticated attackers, with Shop Manager-level access and above, to install and activate the YaySMTP plugin.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Yaymail Plugin | — | Update yaymail plugin to version 4.3.3, or a newer patched version | Feb 18, 2026 | Feb 17, 2026 |
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