CVE-2025-12267 is a cross-site scripting vulnerability identified in the abhicodebox ModernShop e-commerce platform, specifically version 20250922. The vulnerability arises from improper handling of the 'q' parameter in the /search endpoint, which allows an attacker to inject malicious JavaScript code that executes in the context of the victim's browser. This flaw is exploitable remotely without requiring authentication, but user interaction is necessary to trigger the attack, such as clicking a maliciously crafted URL. The vulnerability can lead to theft of session cookies, defacement, or redirection to malicious sites, compromising user confidentiality and integrity. The CVSS 4.0 vector indicates low attack complexity and no privileges required, but user interaction is needed. No known exploits are currently active in the wild, but a public exploit has been published, increasing the risk of exploitation. The vulnerability does not affect system availability directly but can undermine trust in the affected e-commerce platform. The lack of a vendor patch link suggests that a fix may not yet be available, emphasizing the need for interim mitigations. The vulnerability is categorized as medium severity with a CVSS score of 5.3, reflecting moderate risk.

For European organizations using ModernShop, this vulnerability poses a risk to customer data confidentiality and the integrity of user sessions. Successful exploitation could enable attackers to hijack user sessions, steal sensitive information, or conduct phishing attacks by injecting malicious scripts into the web interface. This can lead to reputational damage, loss of customer trust, and potential regulatory penalties under GDPR for failing to protect personal data. The impact is particularly significant for e-commerce businesses that rely on customer interactions through the search functionality. Although the vulnerability does not directly affect system availability, the indirect consequences of exploitation could disrupt business operations and lead to financial losses. Given the public availability of an exploit, the risk of targeted attacks against European e-commerce platforms is heightened.

Organizations should immediately review and sanitize all user inputs, especially the 'q' parameter in the /search endpoint, implementing strict input validation and output encoding to prevent script injection. Deploying Content Security Policy (CSP) headers can help mitigate the impact of XSS by restricting the execution of unauthorized scripts. Web Application Firewalls (WAFs) should be configured to detect and block XSS attack patterns targeting the search functionality. Monitoring web logs for suspicious query parameters and unusual user behavior can help identify attempted exploitation. Since no official patch is currently linked, organizations should engage with the vendor for updates and consider temporary measures such as disabling or restricting the vulnerable search feature if feasible. Educating users about the risks of clicking untrusted links can reduce the likelihood of successful exploitation. Regular security assessments and penetration testing focusing on input validation controls are recommended to ensure comprehensive protection.