CVE-2026-39498 HIGH

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

Vendor Yeeaddons
Product YayMail
Weakness CWE-502 · Unsafe deserialization
Published June 15, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Shop manager PHP Object Injection in YayMail <= 4.3.3 versions.

Explanation of Vulnerability in Simple Terms

02Summary

YayMail versions up to 4.3.3 contain a deserialization vulnerability that allows high-privileged users to execute arbitrary code on the site. An attacker with admin or equivalent access can craft malicious serialized data to trigger code execution. Update to version 4.4.2 or later to patch this issue.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site with full server access.

Potential impact on your site

04Site Impact

A compromised admin account can lead to complete site takeover, data theft, or malware installation.

Conditions required to exploit

05Prerequisites

Attacker must have high-level admin or equivalent privileges on the site.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

Related vulnerabilities

08Related CVE

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