CVE-2026-1831

YayMail <= 4.3.2 - Missing Authorization to Authenticated (Shop Manager+) Plugin Installation and Activation

2.7 Low

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.33%Up 0.3 points since Feb 18, 2026

What each source reports

CVE List Score used 2.7

YayMail <= 4.3.2 - Missing Authorization to Authenticated (Shop Manager+) Plugin Installation and Activation

Record: CVE-2026-1831
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2026-8049 2.7

Record: EUVD-2026-8049
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gxvp-w433-832f 2.7

The YayMail - WooCommerce Email Customizer plugin for WordPress is vulnerable to unauthorized...

Record: GHSA-gxvp-w433-832f
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

NVD 2.7

Record: CVE-2026-1831
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-862
Updated: 2026-11-02

Affected products

yaycommerce yaymail – woocommerce email customizer

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-1831 is a low vulnerability (CVSS 2.7) in Yaycommerce Yaymail – Woocommerce Email Customizer, published February 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.