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CVE-2026-40733— WordPress ShiftUp theme <= 1.3 - PHP Object Injection vulnerability

Quick assessment

Affected
Mikado-Themes ShiftUp
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.

Mikado-Themes ShiftUp是Mikado-Themes的一款开发模板组件。 Mikado-Themes ShiftUp 1.3及之前版本存在反序列化注入漏洞，该漏洞源于未经验证的PHP对象注入，可能导致未授权访问。

CVSS 8.1 · High EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Mikado-Themes ShiftUp n/a≤ 1.3 affected
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I. Basic Information for CVE-2026-40733

Vulnerability Information
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Vulnerability Title
WordPress ShiftUp theme <= 1.3 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated PHP Object Injection in ShiftUp <= 1.3 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
Mikado-Themes ShiftUp 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mikado-Themes ShiftUp是Mikado-Themes的一款开发模板组件。 Mikado-Themes ShiftUp 1.3及之前版本存在反序列化注入漏洞，该漏洞源于未经验证的PHP对象注入，可能导致未授权访问。
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
Mikado-Themes ShiftUp n/a ~ 1.3 -

II. Public POCs for CVE-2026-40733

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III. Intelligence Information for CVE-2026-40733

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Vendor Advisories for CVE-2026-40733 (1)

Same Patch Batch · Mikado-Themes · 2026-06-17 · 7 CVEs total

CVE-2026-39537 8.1 HIGH WordPress Mikado Core plugin <= 1.6 - Local File Inclusion vulnerability
CVE-2026-40731 8.1 HIGH WordPress ChapterOne theme <= 1.7 - Local File Inclusion vulnerability
CVE-2026-40753 8.1 HIGH WordPress EasyMeals theme <= 1.5.1 - PHP Object Injection vulnerability
CVE-2026-52707 8.1 HIGH WordPress Kastell theme <= 2.0 - Local File Inclusion vulnerability
CVE-2026-40757 8.1 HIGH WordPress Château theme <= 1.2.1 - PHP Object Injection vulnerability
CVE-2026-40756 8.1 HIGH WordPress Zoya theme <= 1.4 - PHP Object Injection vulnerability

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-40733

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