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CVE-2026-39573— WordPress Mildhill theme <= 1.5 - PHP Object Injection vulnerability

Quick assessment

Affected
Select-Themes Mildhill
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.

select-themes Mildhill是select-themes个人开发者的一款Mildhill主题插件。 select-themes Mildhill 1.5及之前版本存在反序列化漏洞，该漏洞源于PHP对象注入，可能导致未经身份验证的攻击者利用该漏洞。

CVSS 8.1 · High EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
Select-Themes Mildhill n/a≤ 1.5 affected
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I. Basic Information for CVE-2026-39573

Vulnerability Information
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Vulnerability Title
WordPress Mildhill theme <= 1.5 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated PHP Object Injection in Mildhill <= 1.5 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/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
select-themes Mildhill 反序列化漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
select-themes Mildhill是select-themes个人开发者的一款Mildhill主题插件。 select-themes Mildhill 1.5及之前版本存在反序列化漏洞，该漏洞源于PHP对象注入，可能导致未经身份验证的攻击者利用该漏洞。
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
Select-Themes Mildhill n/a ~ 1.5 -

II. Public POCs for CVE-2026-39573

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III. Intelligence Information for CVE-2026-39573

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Other References for CVE-2026-39573 (1)

Same Patch Batch · Select-Themes · 2026-06-17 · 4 CVEs total

CVE-2026-39545 8.1 HIGH WordPress Zermatt theme <= 1.6.1 - PHP Object Injection vulnerability
CVE-2026-39560 8.1 HIGH WordPress Hiroshi theme <= 1.5.1 - PHP Object Injection vulnerability
CVE-2026-40752 8.1 HIGH WordPress Manufaktur Solutions theme <= 1.1.1 - PHP Object Injection vulnerability

IV. Related Vulnerabilities

Same vendor: Select-Themes
Same weakness: CWE-502

V. Comments for CVE-2026-39573

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