CVE-2025-56426 is a critical vulnerability identified in WebKul Bagisto version 2.3.6, an open-source e-commerce platform. The vulnerability arises from a failure in the price calculation logic within the Cart/Checkout API endpoint to properly validate quantity inputs. Specifically, the API does not adequately sanitize or verify the quantity parameters submitted during cart or checkout operations. This flaw enables a remote attacker to craft malicious requests that manipulate these inputs to trigger arbitrary code execution on the server hosting the Bagisto instance. Since the vulnerability is exploitable remotely and does not require authentication or user interaction, it poses a significant risk. The lack of a CVSS score indicates that the vulnerability is newly published and not yet fully assessed, but the nature of remote code execution in a critical e-commerce component suggests a high severity. No patches or known exploits are currently documented, but the exposure window is critical given the potential for attackers to compromise the entire application, access sensitive customer data, manipulate transactions, or disrupt service availability. The vulnerability specifically targets the price calculation logic, a core function in e-commerce workflows, making it a prime vector for exploitation. Organizations using Bagisto 2.3.6 should prioritize assessment and remediation to prevent exploitation.

For European organizations, this vulnerability could lead to severe consequences including unauthorized access to customer data, financial fraud through manipulated transactions, and complete system compromise. The arbitrary code execution capability allows attackers to install backdoors, exfiltrate sensitive information, or disrupt e-commerce operations, impacting business continuity and customer trust. Given the critical role of e-commerce in European markets, especially in countries with strong digital economies, exploitation could result in significant financial losses and regulatory penalties under GDPR if personal data is compromised. The vulnerability also threatens the integrity of pricing and inventory data, potentially causing cascading effects on supply chains and customer satisfaction. Organizations relying on Bagisto 2.3.6 without mitigations are at high risk of targeted attacks, especially from financially motivated threat actors or competitors.

Immediate mitigation steps include restricting access to the Cart/Checkout API endpoint through network segmentation and firewall rules to limit exposure to trusted IPs only. Organizations should implement strict input validation and sanitization on quantity parameters at the application level as a temporary control. Monitoring API logs for anomalous or unexpected quantity values can help detect exploitation attempts early. It is critical to apply official patches from WebKul as soon as they become available. In the interim, consider deploying Web Application Firewalls (WAFs) with custom rules to block suspicious payloads targeting the quantity input fields. Conduct thorough code reviews and penetration testing focused on the checkout process to identify similar logic flaws. Additionally, ensure that backup and incident response plans are updated to address potential breaches stemming from this vulnerability.