Auth bypass in Yaycommerce Yaymail – Woocommerce Email Customizer
CVE-2026-1937
The YayMail – WooCommerce Email Customizer plugin for WordPress is vulnerable to unauthorized modification of data that can lead to privilege escalation due to a missing capability check on the `yaymail_import_state` AJAX action 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 update arbitrary options on the WordPress site. This can be leveraged to update the default role for registration to administrator and enable user registration for attackers to gain administrative user access to a vulnerable site.
Vulnerability class: Broken Access Control
EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Yaycommerce Yaymail – Woocommerce Email Customizer — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2026-1937?
- CVE-2026-1937 is a high-severity vulnerability in Yaycommerce Yaymail – Woocommerce Email Customizer, classified under Missing Authorization. CVSS score: 7.2/10. Published 2026-02-18.
- How severe is CVE-2026-1937?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2026-1937 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.