CVE-2025-15087 identifies an improper authorization vulnerability in the youlaitech youlai-mall e-commerce platform versions 1.0.0 and 2.0.0. The vulnerability is located in the submitOrderPayment method within the OrderController.java source file. The core issue stems from insufficient validation of the orderSn argument, which is used to identify orders during payment submission. An attacker can manipulate this parameter remotely without authentication or user interaction, potentially allowing unauthorized access to payment submission functionality for orders they do not own or control. This could lead to unauthorized payment processing, order manipulation, or disruption of transaction workflows. The CVSS 4.0 score of 5.3 (medium severity) reflects the network attack vector, low attack complexity, no privileges required, and no user interaction needed, but with limited impact on confidentiality and availability and low integrity impact. The vendor has not issued a patch or responded to the disclosure, and while a public exploit exists, there is no evidence of active exploitation in the wild. The vulnerability highlights a common security oversight in e-commerce platforms where parameter tampering can bypass authorization checks, emphasizing the need for robust server-side validation and access control mechanisms.

For European organizations using youlai-mall, this vulnerability could lead to unauthorized manipulation of order payments, potentially resulting in financial losses, fraudulent transactions, and disruption of business operations. The integrity of order processing is compromised, which may also affect customer trust and brand reputation. Since the vulnerability can be exploited remotely without authentication, attackers could target multiple organizations at scale. The lack of vendor response and patch availability increases exposure duration. Organizations in sectors heavily reliant on e-commerce, such as retail and logistics, are particularly at risk. Additionally, regulatory compliance risks may arise if unauthorized transactions lead to data protection or financial reporting issues under GDPR or other European regulations.

Organizations should immediately conduct a thorough code review of the submitOrderPayment function and related order processing logic to ensure strict authorization checks are enforced on the orderSn parameter. Implement server-side validation to verify that the requesting user is authorized to perform payment operations on the specified order. Employ strong access control mechanisms, such as role-based access control (RBAC) or attribute-based access control (ABAC), to restrict payment submission functionality. Monitor logs and transaction records for unusual or unauthorized order payment activities. If possible, isolate or disable the vulnerable functionality until a vendor patch or official fix is available. Engage with the vendor for updates and consider applying custom patches or workarounds to mitigate risk. Additionally, implement multi-factor authentication and anomaly detection on e-commerce platforms to reduce the risk of exploitation.