Executive Summary

This vulnerability is a Broken Access Control issue in the WordPress plugin "Add Expires Headers & Optimized Minify" up to version 3.1.0. It occurs because of missing authorization, authentication, or nonce token checks in certain functions, which allows unauthenticated users to perform actions that should require higher privileges. [1]

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Impact Analysis

The vulnerability allows unauthorized users to perform privileged actions within the plugin, potentially leading to unauthorized changes or access. However, the severity is considered low (CVSS 5.3), and exploitation is unlikely. No official fix is currently available, but mitigation solutions exist. [1]

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Detection Guidance

Detection involves checking for unauthorized access attempts or actions on the Add Expires Headers & Optimized Minify plugin, especially functions lacking authorization checks. Since no specific detection commands are provided, monitoring web server logs for suspicious requests targeting this plugin and verifying plugin version (<= 3.1.0) is recommended. For example, on a Linux server, you can use commands like 'grep add-expires-headers /var/log/apache2/access.log' or 'grep add-expires-headers /var/log/nginx/access.log' to find relevant requests. Additionally, verify the plugin version via WordPress admin or by checking the plugin files. [1]

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Mitigation Strategies

Immediate mitigation steps include restricting access to the plugin's functionality by limiting permissions to trusted users only, disabling or uninstalling the plugin if not essential, and monitoring for suspicious activity. Since no official fix or patched version is currently available, applying access control measures at the server or application level is advised. Additionally, keep an eye on Patchstack for updates and mitigation solutions. [1]

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