CVE-2025-9835 is an authorization bypass vulnerability identified in the macrozheng mall e-commerce platform, specifically affecting versions 1.0.0 through 1.0.3. The vulnerability resides in the cancelOrder function within the /order/cancelUserOrder endpoint. The issue arises due to improper validation or insufficient authorization checks on the orderId parameter, allowing an attacker to manipulate this argument to cancel orders they are not authorized to manage. This flaw enables remote exploitation without requiring user interaction or elevated privileges, as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:N). The vulnerability impacts the integrity of order management processes by allowing unauthorized order cancellations, potentially disrupting business operations and customer trust. Although the CVSS score is moderate (5.3), the exploitability is relatively straightforward given the low attack complexity and lack of required user interaction. No public exploits are currently known in the wild, but the disclosure of the vulnerability increases the risk of exploitation. The vulnerability does not affect confidentiality or availability directly but compromises the integrity of order data and transactional workflows. The absence of patches or mitigation links in the provided data suggests that affected organizations need to prioritize remediation efforts. Given the nature of the vulnerability, attackers could leverage this flaw to cause financial loss, customer dissatisfaction, or reputational damage by canceling legitimate orders or disrupting order fulfillment processes.

For European organizations using macrozheng mall versions up to 1.0.3, this vulnerability poses a significant risk to the integrity of their e-commerce operations. Unauthorized order cancellations could lead to financial losses, customer service challenges, and erosion of consumer trust. Retailers and businesses relying on this platform may experience operational disruptions, especially during peak sales periods. Additionally, repeated exploitation could result in regulatory scrutiny under GDPR if customer transaction data integrity is compromised or if the incident leads to broader data handling concerns. The medium severity rating reflects that while the vulnerability does not directly expose sensitive data or cause system downtime, the potential for abuse in transactional processes can have cascading effects on business continuity and customer relationships. European organizations with high transaction volumes or those in competitive retail markets are particularly vulnerable to reputational damage and financial impact from such attacks.

1. Immediate implementation of strict authorization checks on the cancelOrder function to ensure that the user initiating the cancellation owns the order or has appropriate permissions. 2. Employ parameter validation and enforce server-side verification of order ownership before processing cancellation requests. 3. Monitor and log all order cancellation requests with detailed audit trails to detect anomalous or unauthorized activities promptly. 4. Apply role-based access control (RBAC) to restrict order management functionalities to authorized personnel only. 5. If a patch from the vendor becomes available, prioritize its deployment across all affected systems. 6. Conduct a thorough security review of related order management endpoints to identify and remediate similar authorization weaknesses. 7. Educate customer service and IT teams about this vulnerability to recognize potential exploitation signs and respond accordingly. 8. Implement rate limiting and anomaly detection on order cancellation endpoints to mitigate automated or bulk exploitation attempts.