TI-2026-82479 Aliases CVE-2026-42701 GHSA-qcx4-hj9x-87rw

PHP object injection in WordPress YayMail plugin

LOW 34CWE-502Published 2026-10-29 · Updated 2026-10-30

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Code execution
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-502.

Summary

YayCommerce YayMail WordPress plugin through 4.4.6 is affected. Deserialization of untrusted data (CWE-502) lets attackers inject PHP objects. A user with shop manager privileges can exploit it, with high impact to confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

Shop manager PHP Object Injection in YayMail <= 4.4.6 versions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0037 31st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

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	up to 4.4.6	—	No fix listed	CNA

YayMail VendorYayCommerce Affected up to 4.4.6 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for YayMail.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Timeline

2026-10-29 Threatist record created from CVE-2026-42701
2026-10-29 Alias added: GHSA-qcx4-hj9x-87rw
2026-10-30 CISA SSVC decision points changed
2026-10-30 Priority changed: MEDIUM → LOW

References

Other 1

https://patchstack.com/database/wordpress/plugin/yaymail/vulnerability/wordpress-yaymail-plugin-4-4-6-php-object-injection-vulnerability?_s_id=cve

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

See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences