CVE-2026-56027 in Booster for WooCommerce Plugin
Summary
by MITRE • 06/26/2026
Customer Arbitrary File Upload in Booster for WooCommerce <= 8.0.1 versions.
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Analysis
by VulDB Data Team • 06/26/2026
The vulnerability identified as arbitrary file upload in Booster for WooCommerce versions 8.0.1 and earlier represents a critical security flaw that allows unauthorized users to upload malicious files to vulnerable web servers. This issue stems from insufficient input validation and inadequate file type restrictions within the plugin's file upload functionality. The flaw enables attackers to bypass normal security measures and execute potentially harmful code on affected systems, making it particularly dangerous for e-commerce environments where sensitive customer data and financial transactions occur.
This vulnerability directly maps to CWE-434 which defines improper restriction of uploads of critical resources as a weakness that occurs when applications fail to properly validate file types, sizes, or content during upload processes. The technical implementation flaw lies in the booster plugin's failure to perform adequate sanitization checks on uploaded files, particularly concerning file extensions and content verification mechanisms. Attackers can exploit this by uploading malicious files such as php scripts, web shells, or other executable code that can then be executed within the web server context.
The operational impact of this vulnerability extends beyond simple privilege escalation or data theft. It creates a persistent backdoor for attackers to maintain long-term access to compromised systems while potentially allowing them to manipulate product catalogs, customer databases, and transaction records. The consequences include unauthorized modification of e-commerce content, potential injection of malicious code into legitimate web pages, and the ability to establish command and control channels through uploaded web shells. These capabilities align with ATT&CK technique T1505.003 which covers server-side injection through file upload mechanisms.
Mitigation strategies for this vulnerability require immediate plugin updates to versions that address the file upload validation issues. System administrators should implement strict file type filtering at multiple levels including web server configuration, application-level validation, and content inspection mechanisms. Additional protective measures include restricting file upload directories from direct web access, implementing proper file extension blacklists, and deploying web application firewalls to monitor and block suspicious upload attempts. The remediation process must also include comprehensive security auditing of uploaded files and implementation of least privilege principles for file upload functionality within the affected plugin.