CVE-2026-42687 HIGH

CVE-2026-42687: WordPress EventPrime plugin <= 4.3.2.1 - PHP Object Injection vulnerability

Vendor Eventprime

Product EventPrime

Weakness CWE-502 · Unsafe deserialization

Published June 15, 2026

Last update June 16, 2026

View on NVD All CVEs

CVSS base score

8.1/10

Attack vector Network

Attack complexity High

Privileges required None

User interaction None

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated PHP Object Injection in EventPrime <= 4.3.2.1 versions.

Explanation of Vulnerability in Simple Terms

02Summary

EventPrime versions up to 4.3.2.1 contain a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code on the site. The vulnerability requires specific network conditions but does not require user interaction. An attacker can exploit this to gain full control of the affected installation.

What an attacker can do

03Attacker Capabilities

Run arbitrary code on the site and take full control of it.

Potential impact on your site

04Site Impact

Complete compromise of the site, including data theft, malware injection, and loss of availability.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 15, 2026 CVE published

June 16, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-42687 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

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