Missing authorization in YayCommerce YayMail – WooCommerce Email Customizer
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| YayCommerce | YayMail – WooCommerce Email Customizer | up to 4.3.2 | — | No fix listed | CNA |
- YayMail – WooCommerce Email Customizer VendorYayCommerce Affected up to 4.3.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1937
- 2026-10-03 Alias added: GHSA-77g9-fwj8-pcwg
References
Other 4
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5a17ded3-340d-494f-be7e-2550dab360bc?source=cve
- https://plugins.trac.wordpress.org/browser/yaymail/trunk/src/Models/MigrationModel.php#L143
- https://plugins.trac.wordpress.org/browser/yaymail/tags/4.3.2/src/Models/MigrationModel.php#L143
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3460087%40yaymail&new=3460087%40yaymail&sfp_email=&sfph_mail=
More YayCommerce vulnerabilities
- TI-2024-06722 Unrestricted file upload in YayCommerce YayExtra – WooCommerce Extra Product Options CVSS 3.1CRITICAL 9.8
- TI-2026-75234 Arbitrary file upload in YaySMTP WordPress plugin enables code execution CVSS 3.1HIGH 8.8
- TI-2025-41603 WordPress YayCurrency plugin <= 3.3 - Arbitrary Content Deletion vulnerability CVSS 3.1HIGH 7.5
- TI-2025-37443 WordPress YayPricing plugin <= 3.5.3 - Broken Access Control vulnerability CVSS 3.1HIGH 7.5
- TI-2025-03017 SMTP for Amazon SES – YaySMTP <= 1.8 - Unauthenticated Stored Cross-Site Scripting via Email Logs CVSS 3.1HIGH 7.2
- TI-2025-00812 Vulnerability: SMTP for Amazon SES <= 1.8 - Unauthenticated Stored Cross-Site Scripting via Email Logs CVSS 3.1HIGH 7.2
Sources
- CVE-2026-1937 · CVE Program
- CVE-2026-1937 · NVD
- FIRST EPSS
- GHSA-77g9-fwj8-pcwg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences