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CVE-2026-39498— WordPress YayMail plugin <= 4.3.3 - PHP Object Injection vulnerability

Quick assessment

Affected
Yeeaddons YayMail
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

YayMail是Yeeaddons组织的一款邮件安全插件。 Yeeaddons YayMail 4.3.3及之前版本存在反序列化漏洞，该漏洞源于PHP对象注入，可能导致商店管理员进行代码执行攻击。

CVSS 7.2 · High EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
Yeeaddons YayMail n/a≤ 4.3.3 affected
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I. Basic Information for CVE-2026-39498

Vulnerability Information
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Vulnerability Title
WordPress YayMail plugin <= 4.3.3 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Shop manager PHP Object Injection in YayMail <= 4.3.3 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Yeeaddons YayMail 反序列化漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
YayMail是Yeeaddons组织的一款邮件安全插件。 Yeeaddons YayMail 4.3.3及之前版本存在反序列化漏洞，该漏洞源于PHP对象注入，可能导致商店管理员进行代码执行攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Yeeaddons YayMail n/a ~ 4.3.3 -

II. Public POCs for CVE-2026-39498

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III. Intelligence Information for CVE-2026-39498

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IV. Related Vulnerabilities

Same product: YayMail
Same weakness: CWE-502

V. Comments for CVE-2026-39498

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