Executive Summary

CVE-2026-23549 is a high-priority PHP Object Injection vulnerability in the WordPress WpEvently plugin versions up to and including 5.1.1.

This vulnerability allows unauthenticated attackers to perform PHP Object Injection by exploiting deserialization of untrusted data.

If a suitable Property Oriented Programming (POP) chain is available, attackers can leverage this to execute code injection, SQL injection, path traversal, denial of service, and other severe impacts.

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Impact Analysis

This vulnerability can have severe impacts including unauthorized code execution, SQL injection, path traversal, and denial of service attacks.

An attacker does not need to be authenticated to exploit this vulnerability, increasing the risk of compromise.

Successful exploitation could lead to full system compromise, data breaches, or service outages.

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Compliance Impact

I don't know

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Detection Guidance

The provided resources do not include specific commands or methods to detect this vulnerability on your network or system.

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'To mitigate the CVE-2026-23549 vulnerability, users should immediately update the WpEvently plugin to version 5.1.2 or later, where the issue has been patched.'}, {'type': 'paragraph', 'content': "Until the update can be applied, users can use Patchstack's mitigation rules to block attacks targeting this vulnerability."}, {'type': 'paragraph', 'content': 'Additionally, Patchstack offers automatic updates for vulnerable plugins and continuous protection through its security platform, which can help in ongoing mitigation.'}] [1]

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