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CVE-2026-56053— WordPress EventPrime plugin <= 4.3.4.1 - PHP Object Injection vulnerability

Quick assessment

Affected
EventPrime EventPrime
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.

EventPrime EventPrime是EventPrime的插件程序。 EventPrime 4.3.4.1及之前版本存在反序列化注入漏洞，该漏洞源于PHP对象注入问题，可能导致订阅者权限的攻击者触发反序列化攻击。

CVSS 8.8 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
EventPrime EventPrime n/a≤ 4.3.4.1 affected
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I. Basic Information for CVE-2026-56053

Vulnerability Information
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Vulnerability Title
WordPress EventPrime plugin <= 4.3.4.1 - PHP Object Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Subscriber PHP Object Injection in EventPrime <= 4.3.4.1 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
EventPrime 反序列化注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EventPrime EventPrime是EventPrime的插件程序。 EventPrime 4.3.4.1及之前版本存在反序列化注入漏洞，该漏洞源于PHP对象注入问题，可能导致订阅者权限的攻击者触发反序列化攻击。
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
EventPrime EventPrime n/a ~ 4.3.4.1 -

II. Public POCs for CVE-2026-56053

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III. Intelligence Information for CVE-2026-56053

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Vendor Advisories for CVE-2026-56053 (1)

IV. Related Vulnerabilities

Same product: EventPrime
Same vendor: EventPrime
Same weakness: CWE-502

V. Comments for CVE-2026-56053

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