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CVE-2026-28176— WordPress Booking Activities plugin <= 1.18.4 - PHP Object Injection vulnerability

Quick assessment

Affected
Booking Activities Team Booking Activities
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.

WordPress Booking Activities是WordPress基金会的一款活动预订管理插件。 WordPress Booking Activities 1.18.4及之前版本存在反序列化注入漏洞，该漏洞源于未经身份验证的PHP对象注入。

CVSS 8.8 · High EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
Booking Activities Team Booking Activities n/a≤ 1.18.4 affected
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I. Basic Information for CVE-2026-28176

Vulnerability Information
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Vulnerability Title
WordPress Booking Activities plugin <= 1.18.4 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated PHP Object Injection in Booking Activities <= 1.18.4 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
WordPress Booking Activities 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Booking Activities是WordPress基金会的一款活动预订管理插件。 WordPress Booking Activities 1.18.4及之前版本存在反序列化注入漏洞，该漏洞源于未经身份验证的PHP对象注入。
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
Booking Activities Team Booking Activities n/a ~ 1.18.4 -

II. Public POCs for CVE-2026-28176

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III. Intelligence Information for CVE-2026-28176

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Vendor Advisories for CVE-2026-28176 (1)

IV. Related Vulnerabilities

Same product: Booking Activities
Same vendor: Booking Activities Team
Same weakness: CWE-502

V. Comments for CVE-2026-28176

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