Unauthorized Plugin Installation Vulnerability in YayMail for WooCommerce
CVE-2026-1831

2.7LOW

Key Information:

Vendor

WordPress
Status
Yaymail – WooCommerce Email Customizer
Vendor
CVE Published:
18 February 2026

What is CVE-2026-1831?

The YayMail - WooCommerce Email Customizer for WordPress is susceptible to exploitation due to a lack of proper capability checks. This vulnerability affects all versions up to and including 4.3.2, allowing authenticated users with Shop Manager-level access or higher to exploit the 'yaymail_install_yaysmtp' AJAX action and the '/yaymail/v1/addons/activate' REST endpoint. Consequently, attackers can install and activate the YaySMTP plugin without sufficient authorization, posing significant security risks to WordPress installations using YayMail.

Affected Version(s)

YayMail – WooCommerce Email Customizer 0 <= 4.3.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/yaymail/tags/4...
https://plugins.trac.wordpress.org/browser/yaymail/trunk/...

CVSS V3.1

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

whizzu
.