Unauthenticated PHP Object Injection in Zermatt

Compliance Impact

The vulnerability in the WordPress Zermatt Theme (versions 1.6.1 and below) allows unauthenticated attackers to perform code injection, SQL injection, path traversal, denial of service, and other malicious actions. Such exploits can lead to unauthorized access, data breaches, and service disruptions.

These security risks can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require the protection of personal and sensitive data against unauthorized access and breaches.

Failure to mitigate this vulnerability could result in violations of these regulations due to potential data compromise or service unavailability.

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Executive Summary

The WordPress Zermatt Theme, versions 1.6.1 and below, is vulnerable to an unauthenticated PHP Object Injection vulnerability. This flaw allows attackers to inject malicious PHP objects without needing any prior authentication.

Exploitation of this vulnerability can lead to various malicious actions such as code injection, SQL injection, path traversal, and denial of service if a suitable POP (Property Oriented Programming) chain exists.

The vulnerability has a high severity score of 8.1, indicating it is highly dangerous and likely to be exploited in widespread attacks.

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Impact Analysis

This vulnerability can have severe impacts including unauthorized code execution, which may compromise the entire website or server.

Attackers can perform SQL injection, potentially exposing or manipulating sensitive data stored in the database.

Path traversal attacks could allow attackers to access files and directories outside the intended scope, leading to further system compromise.

Denial of service attacks could disrupt the availability of your website, affecting users and business operations.

Since the vulnerability is unauthenticated, attackers do not need any prior access, increasing the risk of exploitation.

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Mitigation Strategies

Immediate action is required to mitigate the risk of the PHP Object Injection vulnerability in the WordPress Zermatt Theme versions 1.6.1 and below.

• Update the Zermatt theme to version 1.7 or later.
• Alternatively, apply the mitigation rule provided by Patchstack if updating is not immediately possible.

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