Customer Arbitrary File Upload in Booster for WooCommerce

Executive Summary

The WordPress Booster for WooCommerce plugin, versions 8.0.1 and below, has a critical vulnerability that allows attackers to upload arbitrary files to a website.

This means an attacker can upload malicious files, such as backdoors, which can grant them unauthorized access to the affected website.

The vulnerability is classified as high severity with a CVSS score of 9.9 and falls under the OWASP Top 10 category A3: Injection.

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Detection Guidance

The vulnerability allows arbitrary file uploads which can be exploited to upload malicious files such as backdoors. Detection can involve monitoring for unusual file uploads or unexpected files in the web server directories related to the Booster for WooCommerce plugin.

Specific commands are not provided in the available resources, but general approaches include checking web server logs for suspicious POST requests targeting the plugin upload endpoints and scanning the file system for recently added or modified files that are unusual or suspicious.

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Impact Analysis

This vulnerability can have severe impacts including unauthorized access to your website through malicious files uploaded by attackers.

Attackers can use these uploaded files to execute backdoors, potentially compromising the confidentiality, integrity, and availability of your website.

The vulnerability is actively exploited in mass campaigns, putting even low-traffic or less popular sites at significant risk.

Immediate mitigation actions such as updating the plugin to version 8.0.2 or later, or applying automated mitigation rules, are necessary to reduce this risk.

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Compliance Impact

The vulnerability allows attackers to upload arbitrary malicious files, including backdoors, which can lead to unauthorized access to a website.

Such unauthorized access and potential data breaches can compromise the confidentiality, integrity, and availability of sensitive data.

This poses significant risks to compliance with common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive information against unauthorized access and breaches.

Immediate mitigation, such as updating the plugin or applying security rules, is necessary to reduce the risk of non-compliance.

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Mitigation Strategies

Immediate mitigation steps include updating the Booster for WooCommerce plugin to version 8.0.2 or later, which contains the fix for this vulnerability.

If updating is not possible immediately, users should seek assistance from their hosting provider or web developer.

Additionally, Patchstack offers an automated mitigation rule that can be applied to block attacks exploiting this vulnerability until the plugin is updated.

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