CVE-2026-1831 YayMail <= 4.3.2 - Missing Authorization to Authenticated (Shop Manager+) Plugin Installation and Activation
Authenticated Shop Managers can install and activate the YaySMTP plugin due to missing capability checks, potentially leading to privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1831?
CVE-2026-1831 is a low-severity missing authorization vulnerability in yaycommerce YayMail – WooCommerce Email Customizer, published on 18 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-1831?
How do I fix CVE-2026-1831?
No fix has been published for CVE-2026-1831 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1831 being exploited?
There is no known exploitation of CVE-2026-1831 in the wild and no public exploit code.
Sources
Also known as GHSA-gxvp-w433-832f.