CVE-2026-1831 PUBLISHED

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.

• whizzu finder

• https://www.wordfence.com/threat-intel/vulnerabilities/id/a568162a-5a2d-47ab-9dfe-2f2f5f324f0d?source=cve
• https://plugins.trac.wordpress.org/browser/yaymail/tags/4.3.2/src/Ajax.php#L183
• https://plugins.trac.wordpress.org/browser/yaymail/trunk/src/Ajax.php#L183
• https://plugins.trac.wordpress.org/browser/yaymail/tags/4.3.2/src/Controllers/AddonController.php#L76
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3460087%40yaymail&new=3460087%40yaymail&sfp_email=&sfph_mail=#file11

• CWE-862 Missing Authorization CWE