Executive Summary

The Frontend Admin by DynamiApps plugin for WordPress has a vulnerability involving PHP Object Injection through the deserialization of the 'post_content' of admin_form posts. This occurs because the plugin uses WordPress's `maybe_unserialize()` function without restricting the classes that can be unserialized on user-controllable content. Authenticated attackers with Editor-level access or higher can exploit this to inject a PHP object. The presence of a POP (Property Oriented Programming) chain enables attackers to achieve remote code execution.

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Impact Analysis

This vulnerability can have severe impacts including remote code execution on the affected WordPress site. An attacker with Editor-level access or above can inject malicious PHP objects, potentially allowing them to execute arbitrary code, compromise the website, manipulate data, or gain further control over the server hosting the WordPress installation.

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Mitigation Strategies

The vulnerability exists in all versions of the Frontend Admin by DynamiApps plugin for WordPress up to and including 3.28.31.

To mitigate this vulnerability, you should update the plugin to a version later than 3.28.31 where the issue is fixed.

The update addresses critical bugs and improves security by fixing issues related to admin form loading and user deletion, which are part of the plugin's backend logic.

Ensure that only trusted users have Editor-level access or higher, as the vulnerability requires authenticated attackers with such privileges.

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Compliance Impact

The vulnerability in the Frontend Admin by DynamiApps plugin allows authenticated attackers with Editor-level access to perform PHP Object Injection leading to remote code execution. This can result in unauthorized access, data manipulation, or data breaches.

Such unauthorized access and potential data breaches can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive data, secure access controls, and prevention of unauthorized system access.

Specifically, the ability to execute remote code could lead to exposure or alteration of protected data, violating confidentiality, integrity, and availability requirements mandated by these regulations.

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Detection Guidance

This vulnerability involves PHP Object Injection via deserialization of the 'post_content' of admin_form posts in the Frontend Admin by DynamiApps WordPress plugin. Detection typically requires inspecting WordPress posts of type 'admin_form' for suspicious serialized PHP objects in their 'post_content'.

Since the vulnerability requires authenticated attackers with Editor-level access or higher, monitoring for unusual admin_form post updates or unexpected serialized data in the database can help detect exploitation attempts.

You can use database queries to detect potentially malicious serialized objects in the 'post_content' field of posts with post_type 'admin_form'. For example, using MySQL commands:

• SELECT ID, post_title, post_content FROM wp_posts WHERE post_type = 'admin_form' AND post_content LIKE '%O:%';
• This query looks for serialized PHP objects (which start with 'O:') in the post_content of admin_form posts.

Additionally, monitoring WordPress logs or audit trails for changes to admin_form posts by users with Editor or higher roles can help identify suspicious activity.

There are no specific commands or network detection signatures provided in the available resources, so detection relies on manual inspection of the database and monitoring of admin_form post updates.

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