CVE-2026-27540 in Wholesale Lead Capture Plugin
Summary
by MITRE • 03/19/2026
Unrestricted Upload of File with Dangerous Type vulnerability in Rymera Web Co Pty Ltd. Woocommerce Wholesale Lead Capture allows Using Malicious Files.This issue affects Woocommerce Wholesale Lead Capture: from n/a through 2.0.3.1.
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Analysis
by VulDB Data Team • 03/22/2026
The vulnerability identified as CVE-2026-27540 represents a critical security flaw in the WooCommerce Wholesale Lead Capture plugin developed by Rymera Web Co Pty Ltd. This issue manifests as an unrestricted file upload vulnerability that permits malicious actors to upload files with potentially dangerous types, thereby compromising the integrity and security of affected systems. The vulnerability specifically impacts versions of the plugin ranging from the initial release through version 2.0.3.1, indicating a prolonged period during which this weakness remained unaddressed. The flaw resides in the plugin's file upload handling mechanisms, which fail to adequately validate or restrict the types of files that can be uploaded to the server, creating an avenue for attackers to execute arbitrary code or deploy malicious payloads.
The technical exploitation of this vulnerability occurs through the manipulation of file upload functionality within the WooCommerce plugin interface. Attackers can leverage this weakness to upload malicious files such as php scripts, web shells, or other executable content that can be executed within the web server context. The unrestricted nature of the upload process means that the plugin does not implement proper file type validation, content inspection, or sanitization measures that would normally prevent the upload of dangerous file extensions or content. This vulnerability directly maps to CWE-434, which describes the weakness of unrestricted upload of file with dangerous type, and aligns with ATT&CK technique T1190, which involves exploiting vulnerabilities in web applications to upload and execute malicious files. The vulnerability's impact is amplified by the fact that it operates within a widely used e-commerce plugin ecosystem, potentially affecting numerous WordPress installations that rely on WooCommerce for their business operations.
The operational consequences of this vulnerability extend beyond simple code execution, as it provides attackers with persistent access to compromised systems and potential pathways for lateral movement within network infrastructures. Once an attacker successfully uploads a malicious file, they can establish backdoors, exfiltrate sensitive customer data, manipulate product listings, or use the compromised system as a launchpad for further attacks. The vulnerability affects not only the immediate web application but also potentially exposes underlying database systems and server resources that are part of the WooCommerce ecosystem. Organizations using affected plugin versions face risks including data breaches, loss of customer trust, regulatory compliance violations, and potential financial losses due to system compromise. The impact is particularly severe in e-commerce environments where customer data, payment information, and business-critical operations are handled through these platforms, making the vulnerability a prime target for cybercriminals seeking to exploit retail and wholesale business systems.
Mitigation strategies for CVE-2026-27540 require immediate action from affected organizations to address the vulnerability through plugin updates and enhanced security measures. The most effective immediate solution involves upgrading to the latest version of the WooCommerce Wholesale Lead Capture plugin where the vulnerability has been patched and proper file validation mechanisms have been implemented. Organizations should also implement additional defensive measures including restricting file upload capabilities, implementing strict file type validation, configuring proper file permissions, and establishing content inspection mechanisms to prevent malicious file uploads. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense by monitoring for suspicious upload activities and blocking known malicious file patterns. Security teams should conduct comprehensive vulnerability assessments of their WooCommerce installations to identify any other potentially affected plugins or components, while also implementing regular security monitoring and patch management processes to prevent similar vulnerabilities from emerging in the future. The remediation process should also include thorough testing of updated plugins to ensure compatibility and functionality while maintaining the security posture of the overall e-commerce platform.