CVE-2025-56382 is a stored Cross-site Scripting (XSS) vulnerability identified in the Customer Management Module of LionCoders SalePro POS version 5.4.8. The vulnerability allows an authenticated attacker to inject arbitrary web scripts or HTML code into the 'Customer Name' field when creating or editing customer profiles. This malicious input is improperly sanitized before being stored in the system and subsequently rendered in the browsers of users who access the affected customer details. As a stored XSS, the injected script persists in the application database and executes whenever the compromised data is viewed, potentially affecting multiple users. The exploitation requires the attacker to have valid credentials to access the customer management functionality, but no additional user interaction is needed beyond viewing the malicious profile. The impact of this vulnerability includes the possibility of session hijacking, theft of sensitive information such as cookies or credentials, unauthorized actions performed on behalf of legitimate users, and potential spread of malware. Although no public exploits have been reported yet, the vulnerability poses a significant risk to organizations relying on this POS software, especially in environments with multiple users accessing customer data. The lack of a CVSS score suggests the vulnerability is newly disclosed and pending further assessment. The vulnerability highlights insufficient input validation and output encoding in the affected module, which are critical security controls for preventing XSS attacks.

For European organizations, this vulnerability can lead to significant security risks including compromise of user sessions, unauthorized access to sensitive customer data, and potential disruption of retail operations. Since SalePro POS is used in retail environments, exploitation could result in theft of customer information, manipulation of sales data, or fraudulent transactions. The stored nature of the XSS means that multiple employees or administrators viewing customer profiles could be impacted, increasing the attack surface. Confidentiality is at risk due to possible data leakage via script execution, integrity can be compromised if attackers perform unauthorized actions, and availability might be indirectly affected if the system is disrupted or administrators disable access to mitigate the threat. Retailers in Europe, especially those with centralized customer management and multiple users accessing the POS system, face operational and reputational risks. The requirement for authentication limits exposure to internal or credentialed attackers, but insider threats or compromised accounts could be leveraged. The absence of known exploits suggests a window for proactive mitigation before widespread abuse occurs.

European organizations using LionCoders SalePro POS 5.4.8 should immediately review and restrict access to the Customer Management Module to trusted personnel only. Implement strict input validation and output encoding on the 'Customer Name' parameter to prevent injection of malicious scripts. If a patch or update from LionCoders becomes available, prioritize its deployment. In the absence of a patch, consider applying Web Application Firewall (WAF) rules to detect and block suspicious input patterns targeting the vulnerable parameter. Conduct regular audits of customer profiles for suspicious entries and remove any malicious content. Educate staff about the risks of stored XSS and enforce strong authentication controls, including multi-factor authentication, to reduce the risk of account compromise. Monitor logs for unusual activity related to customer profile edits. Additionally, isolate the POS system network segment to limit lateral movement if exploitation occurs. Finally, coordinate with LionCoders support for updates and guidance on secure configuration.