CVE-2025-67683 is a reflected Cross-site Scripting (XSS) vulnerability classified under CWE-79 affecting OpenSolution's Quick.Cart e-commerce platform, specifically version 6.7. The vulnerability arises from improper neutralization of user-supplied input in the sSort URL parameter, which is reflected in web page generation without adequate sanitization or encoding. This flaw allows attackers to craft malicious URLs that, when accessed by users, execute arbitrary JavaScript code within the victim's browser context. Such execution can lead to theft of session cookies, redirection to malicious sites, or unauthorized actions performed on behalf of the user. The vulnerability is remotely exploitable over the network without requiring authentication, but it does require user interaction to click or visit the malicious link. The CVSS 4.0 vector indicates low attack complexity and no privileges required, but user interaction is necessary. The vendor was notified early but has not disclosed the full vulnerable version range or issued patches, and only version 6.7 has been confirmed vulnerable through testing. No known exploits have been reported in the wild, but the lack of vendor response and patch availability increases risk. The vulnerability's scope is limited to the affected version, but other versions may also be susceptible due to similar codebases. This vulnerability poses a risk primarily to users of Quick.Cart e-commerce sites, potentially undermining user trust and leading to data compromise or fraud.

For European organizations, especially those operating e-commerce platforms using OpenSolution Quick.Cart version 6.7, this vulnerability could lead to significant risks including session hijacking, credential theft, and fraudulent transactions. The reflected XSS can be leveraged to bypass same-origin policies, enabling attackers to steal sensitive user data or perform unauthorized actions on behalf of customers. This undermines customer trust and can result in reputational damage, regulatory penalties under GDPR for data breaches, and financial losses. Since Quick.Cart is a commercial e-commerce solution, organizations in retail, wholesale, and online services sectors are particularly at risk. The medium CVSS score reflects moderate impact, but the ease of exploitation and lack of vendor patching elevate the urgency. Additionally, the absence of known exploits currently provides a window for mitigation, but attackers may develop exploits rapidly given the public disclosure. The threat also extends to supply chain risks if third-party integrations rely on vulnerable Quick.Cart instances. Overall, the vulnerability can disrupt availability of services if exploited at scale and compromise confidentiality and integrity of user data.

European organizations should immediately audit their Quick.Cart installations to identify version 6.7 deployments. Until an official patch is released, implement strict input validation and output encoding on the sSort parameter at the web application firewall (WAF) or reverse proxy level to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers. Educate users and staff about the risks of clicking suspicious links. Monitor web server logs for unusual URL patterns targeting the sSort parameter. Consider disabling or restricting the sSort parameter functionality if feasible. Engage with OpenSolution for updates and request timely patches. Conduct penetration testing focused on XSS vectors to identify other potential injection points. For longer-term resilience, migrate to updated or alternative e-commerce platforms with active security support. Implement multi-factor authentication (MFA) for administrative access to reduce impact of session hijacking. Finally, ensure incident response plans include procedures for XSS exploitation scenarios.