CVE-2026-1831
YayMail <= 4.3.2 - Missing Authorization to Authenticated (Shop Manager+) Plugin Installation and Activation
CVSS Score
2.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | yaycommerce |
| Product | yaymail – woocommerce email customizer |
| Published | Feb 18, 2026 |
| Last Updated | Apr 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for yaycommerce yaymail – woocommerce email customizer
Be the first to know when new low vulnerabilities affecting yaycommerce yaymail – woocommerce email customizer are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
yaycommerce / YayMail – WooCommerce Email Customizer
0 ≤ 4.3.2
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/a568162a-5a2d-47ab-9dfe-2f2f5f324f0d?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/yaymail/tags/4.3.2/src/Ajax.php#L183 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/yaymail/trunk/src/Ajax.php#L183 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/yaymail/tags/4.3.2/src/Controllers/AddonController.php#L76 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3460087%40yaymail&new=3460087%40yaymail&sfp_email=&sfph_mail=#file11
Credits
Daniel Basta