CVE-2026-28114 in WooCommerce License Manager Plugin
Summary
by MITRE • 03/05/2026
Unrestricted Upload of File with Dangerous Type vulnerability in firassaidi WooCommerce License Manager fs-license-manager allows Upload a Web Shell to a Web Server.This issue affects WooCommerce License Manager: from n/a through <= 7.0.6.
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Analysis
by VulDB Data Team • 03/07/2026
The vulnerability identified as CVE-2026-28114 represents a critical security flaw in the firassaidi WooCommerce License Manager plugin, specifically impacting versions through 7.0.6. This issue constitutes an unrestricted file upload vulnerability that allows malicious actors to bypass normal security restrictions and upload files with potentially dangerous extensions to the web server. The vulnerability stems from inadequate validation and sanitization of file upload inputs within the plugin's license management functionality, creating a pathway for remote code execution through web shell deployment.
The technical flaw manifests in the plugin's failure to properly validate file types during the upload process, enabling attackers to submit files with extensions that should be restricted or prohibited. This weakness allows the upload of web shells or other malicious payloads that can execute arbitrary code on the compromised server. The vulnerability operates at the application layer and can be exploited through the plugin's license management interface, where users with appropriate privileges or unauthenticated attackers may leverage the flaw to gain persistent access to the web server. The unrestricted nature of the upload mechanism means that attackers can bypass standard security controls designed to prevent the upload of executable or dangerous file types.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with a direct path to establish persistent backdoors on affected systems. Once a web shell is successfully uploaded, attackers can execute commands remotely, potentially leading to complete system compromise, data exfiltration, and further lateral movement within the network. The vulnerability affects WooCommerce installations that utilize the firassaidi License Manager plugin, making it particularly concerning for e-commerce sites that may be targeted due to their valuable data assets and potential for financial gain. The exploitation of this vulnerability can result in significant business disruption, regulatory compliance violations, and financial losses due to data breaches and system compromise.
Mitigation strategies for this vulnerability should include immediate patching of the affected plugin to version 7.0.7 or later, which contains the necessary security fixes to prevent unauthorized file uploads. Organizations should also implement additional security controls such as restricting file upload permissions, implementing strict file type validation, and deploying web application firewalls to monitor and block suspicious upload attempts. The principle of least privilege should be enforced by limiting upload capabilities to only authorized users and implementing proper access controls around the plugin's functionality. Additionally, regular security audits and vulnerability assessments should be conducted to identify and remediate similar weaknesses in other plugins and web applications. This vulnerability aligns with CWE-434 which addresses unrestricted Upload of File with Dangerous Type, and represents a technique commonly mapped to ATT&CK tactic TA0001 (Initial Access) and technique T1190 (Exploit Public-Facing Application) in threat actor methodologies.