CVE-2025-12267 is a cross-site scripting (XSS) vulnerability identified in the abhicodebox ModernShop e-commerce platform, specifically version 20250922. The vulnerability arises from improper sanitization or encoding of user-supplied input in the 'q' parameter of the /search endpoint. An attacker can craft a malicious URL containing a payload in the 'q' parameter that, when visited by a user, causes the victim's browser to execute arbitrary JavaScript code. This type of reflected XSS attack can be launched remotely without any authentication or privileges, relying solely on user interaction to trigger the payload. The CVSS 4.0 vector indicates no privileges required (PR:N), no user interaction required (UI:P), and no impact on confidentiality (VC:N) or availability (VA:N), but low impact on integrity (VI:L). The vulnerability can be exploited to steal session cookies, perform actions on behalf of the user, or redirect users to malicious websites, potentially leading to account compromise or phishing attacks. Although no active exploitation in the wild has been reported, the availability of a public exploit increases the risk of imminent attacks. The lack of official patches or vendor advisories at this time necessitates immediate attention from administrators. The vulnerability affects only the specified version 20250922 of ModernShop, so organizations running this version are at risk. The attack surface is the public-facing search functionality, which is commonly accessible and frequently used, increasing exposure. The flaw highlights the importance of proper input validation and output encoding in web applications to prevent injection-based attacks.

For European organizations using abhicodebox ModernShop version 20250922, this XSS vulnerability poses a moderate risk to the confidentiality and integrity of user data. Attackers can exploit it to hijack user sessions, steal sensitive information, or conduct phishing attacks by injecting malicious scripts into the search page. This can lead to reputational damage, loss of customer trust, and potential regulatory penalties under GDPR if personal data is compromised. The availability of a public exploit increases the likelihood of targeted attacks, especially against e-commerce platforms that handle payment and personal information. While the vulnerability does not directly affect system availability, successful exploitation can facilitate further attacks or fraud. Organizations with high volumes of web traffic and customer interactions are particularly vulnerable, as more users increase the chance of successful exploitation. The impact is amplified in sectors such as retail, finance, and healthcare, where data sensitivity and compliance requirements are stringent. Additionally, attackers could leverage this vulnerability as an initial foothold for more complex multi-stage attacks. Prompt mitigation is essential to reduce exposure and protect end users.

1. Apply official patches or updates from abhicodebox as soon as they become available for ModernShop version 20250922. 2. Implement strict input validation on the 'q' parameter to allow only expected characters and reject or sanitize any suspicious input. 3. Use proper output encoding (e.g., HTML entity encoding) on all user-supplied data before rendering it in the search results page to prevent script execution. 4. Employ Content Security Policy (CSP) headers to restrict the execution of inline scripts and reduce the impact of potential XSS payloads. 5. Conduct regular security testing, including automated scanning and manual code review, focusing on input handling in web application endpoints. 6. Educate users and administrators about the risks of clicking untrusted links and recognizing phishing attempts. 7. Monitor web server logs and intrusion detection systems for unusual requests targeting the /search endpoint with suspicious parameters. 8. Consider implementing Web Application Firewalls (WAF) with rules to detect and block common XSS attack patterns targeting the 'q' parameter. 9. Limit the exposure of the search functionality if possible, such as restricting access or adding CAPTCHA to reduce automated exploitation attempts. 10. Maintain an incident response plan to quickly address any detected exploitation attempts or breaches related to this vulnerability.