CVE-2025-13118 is an improper authorization vulnerability affecting the macrozheng mall-swarm e-commerce platform versions 1.0.0 through 1.0.3. The vulnerability resides in the paySuccess function located at /order/paySuccess, where the orderID parameter is insufficiently validated. An attacker can remotely manipulate this argument to bypass authorization controls, potentially triggering unauthorized payment success callbacks or altering order statuses without proper permissions. The vulnerability requires no user interaction or authentication, making it accessible to unauthenticated remote attackers. The vendor was contacted early but has not responded or provided a patch, and a public exploit is available, increasing the likelihood of exploitation. The CVSS 4.0 score is 5.3 (medium), reflecting network attack vector, low complexity, no privileges required, no user interaction, and limited confidentiality, integrity, and availability impacts. The flaw could allow attackers to fraudulently confirm payments or manipulate order processing, leading to financial losses and undermining trust in the platform. No official patches or mitigations have been released, so organizations must implement compensating controls. The vulnerability highlights the critical need for robust authorization checks on all input parameters affecting payment and order workflows in e-commerce applications.

For European organizations using macrozheng mall-swarm or derivative e-commerce platforms, this vulnerability poses a risk of unauthorized payment confirmation and order manipulation. This can lead to direct financial losses through fraudulent transactions, disruption of order fulfillment processes, and reputational damage due to compromised transaction integrity. Retailers relying on this platform may face customer trust erosion and potential regulatory scrutiny under GDPR if customer data or transaction integrity is compromised. The remote and unauthenticated nature of the exploit increases the attack surface, potentially allowing widespread abuse. Additionally, the lack of vendor response and patches means organizations must act independently to secure their systems. The impact is particularly significant for mid-sized and large online retailers in Europe that handle high volumes of transactions and rely on automated payment processing workflows. Disruptions could also affect supply chain partners and payment processors integrated with the platform.

Organizations should immediately audit the paySuccess function and all related payment processing endpoints to ensure strict authorization checks are enforced on the orderID parameter and any other critical inputs. Implement server-side validation to verify that the user or system component invoking paySuccess is authorized to confirm the specific orderID. Employ logging and monitoring to detect anomalous or repeated payment success callbacks that could indicate exploitation attempts. If possible, temporarily disable or restrict access to the vulnerable endpoint until a patch or fix is developed. Consider implementing Web Application Firewall (WAF) rules to block suspicious requests targeting /order/paySuccess with manipulated orderID values. Engage in code reviews to identify similar authorization weaknesses elsewhere in the platform. If feasible, migrate to alternative e-commerce solutions with active security support. Maintain up-to-date backups and incident response plans to quickly recover from potential fraud or data integrity incidents. Finally, pressure the vendor for an official patch and monitor threat intelligence sources for exploit developments.