CVE-2025-15087 is an improper authorization vulnerability identified in the youlai-mall e-commerce platform developed by youlaitech, specifically affecting versions 1.0.0 and 2.0.0. The flaw resides in the submitOrderPayment method within the OrderController.java source file, where the orderSn parameter is not properly validated or authorized before processing. This allows an attacker to manipulate the orderSn argument remotely, bypassing authorization checks and potentially submitting payments or altering order states without legitimate permissions. The vulnerability requires no user interaction and no prior authentication, increasing its exploitation risk. The CVSS 4.0 score of 5.3 reflects a medium severity, considering the network attack vector, low attack complexity, and lack of privileges or user interaction needed. Despite public disclosure of the exploit, there is no verified evidence of exploitation in the wild, and the vendor has not provided any patches or official response. The lack of vendor engagement and patch availability increases the risk exposure for users of the affected versions. This vulnerability could lead to unauthorized financial transactions, order manipulation, or fraud within affected e-commerce systems, impacting business operations and customer trust.

For European organizations using youlai-mall versions 1.0.0 or 2.0.0, this vulnerability poses a risk to the integrity and confidentiality of e-commerce transactions. Attackers exploiting this flaw could manipulate order payments, potentially causing financial losses, fraudulent transactions, or disruption of order fulfillment processes. This could damage customer trust and lead to regulatory scrutiny under GDPR if personal or payment data is compromised. The remote and unauthenticated nature of the exploit increases the likelihood of attacks, especially against publicly accessible e-commerce platforms. Organizations in sectors with high online transaction volumes, such as retail and logistics, are particularly vulnerable. The absence of vendor patches means organizations must rely on compensating controls, increasing operational overhead. Additionally, reputational damage and potential legal liabilities could arise if customer data or payments are affected. Overall, the vulnerability could disrupt business continuity and financial stability for European companies dependent on youlai-mall.

Given the lack of official patches from youlaitech, European organizations should implement immediate compensating controls. First, restrict network access to the submitOrderPayment endpoint using web application firewalls (WAFs) or API gateways to filter and block suspicious or malformed orderSn parameters. Implement strict input validation and parameter sanitization at the application or proxy level to prevent unauthorized manipulation. Monitor logs for unusual order payment activities or repeated attempts to exploit orderSn parameters. Employ anomaly detection systems to identify abnormal transaction patterns. If possible, upgrade to a newer, unaffected version of youlai-mall once available or consider migrating to alternative e-commerce platforms with active vendor support. Conduct regular security assessments and penetration testing focused on authorization controls. Educate development teams on secure coding practices to prevent similar authorization flaws. Finally, maintain an incident response plan tailored to e-commerce fraud and unauthorized transaction scenarios to quickly address potential exploitation.