The vulnerability identified as CVE-2025-67263 affects Abacre Retail Point of Sale version 14.0.0.396, specifically within the Clients module. It is a stored cross-site scripting (XSS) flaw caused by improper sanitization of user-supplied input in the Name and Surname fields. Attackers can inject malicious HTML or JavaScript code into these fields, which is then stored persistently in the application's database. When legitimate users or administrators access the affected client records, the embedded scripts execute within their browsers under the context of the POS application. This can lead to a range of malicious outcomes including session hijacking, theft of authentication tokens, unauthorized actions on behalf of the user, or delivery of further malware. The vulnerability arises from a failure to implement adequate input validation and output encoding, which are critical defenses against XSS attacks. Although no public exploits have been reported to date and no CVSS score has been assigned, the nature of stored XSS in a POS environment is concerning due to the potential for compromise of sensitive customer and transaction data. The persistence of the malicious payload increases the attack surface, as multiple users may be exposed over time. The lack of patches or official remediation guidance further elevates the risk. This vulnerability highlights the importance of secure coding practices in retail software, especially in modules handling client information. Organizations using this version of Abacre POS should prioritize detection and mitigation to prevent exploitation.

For European organizations, exploitation of this stored XSS vulnerability could lead to significant security incidents. Retail environments often handle sensitive customer data, including payment information and personally identifiable information (PII). Successful attacks may result in theft of customer credentials, unauthorized transactions, or manipulation of POS operations, undermining trust and causing financial losses. The persistence of malicious scripts means multiple employees or administrators could be affected, increasing the likelihood of widespread compromise. Additionally, attackers could leverage this vulnerability to move laterally within the network or deploy further malware, potentially disrupting retail operations. Regulatory compliance risks are also notable, as breaches involving customer data can trigger GDPR violations with substantial fines. The absence of known exploits currently provides a window for proactive defense, but the vulnerability’s presence in a critical retail application demands urgent attention to avoid reputational damage and operational impact.

To mitigate this vulnerability, organizations should implement strict input validation and output encoding on the Name and Surname fields within the Clients module to prevent malicious script injection. If vendor patches become available, they must be applied immediately. In the absence of patches, consider deploying web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting these fields. Restrict user privileges so that only trusted personnel can add or modify client data, reducing the risk of malicious input. Conduct regular security audits and code reviews focusing on input handling in the POS software. Monitor logs and user activity for unusual behavior indicative of exploitation attempts. Educate staff about the risks of XSS and safe handling of client data. Where feasible, isolate the POS system network segment to limit lateral movement if compromise occurs. Finally, maintain up-to-date backups to enable recovery in case of an incident.