CVE-2025-11291 identifies a cross-site scripting (XSS) vulnerability in the ixmaps website2017 product, affecting versions up to commit 0c71cffa0162186bc057a76766bc97e9f5a3a2d0. The vulnerability is located in the /map.php file within the HTTP GET Request Handler component, specifically through manipulation of the 'trid' argument. This parameter is not properly sanitized, allowing an attacker to inject malicious JavaScript code that executes in the context of the victim's browser. The attack vector is remote and does not require authentication, but user interaction is necessary, typically by convincing a user to click a crafted URL containing the malicious 'trid' parameter. The vulnerability has a CVSS 4.0 score of 5.3, indicating medium severity, with an exploit publicly available. The vendor uses continuous delivery with rolling releases, complicating identification of affected versions and patch availability. Despite early notification, the vendor has not responded or issued a fix. The vulnerability can be exploited to steal session cookies, perform actions on behalf of the user, or redirect users to malicious sites, undermining confidentiality and integrity of user data. The lack of vendor response and public exploit availability increases the urgency for organizations to implement mitigations independently.

For European organizations, this XSS vulnerability poses risks primarily to confidentiality and integrity of user sessions and data. Exploitation can lead to session hijacking, unauthorized actions, phishing, and malware distribution. Organizations relying on ixmaps website2017 for geospatial or mapping services may experience reputational damage and loss of user trust if exploited. The vulnerability's remote exploitability without authentication broadens the attack surface, especially for public-facing web applications. Given the vendor's lack of response, organizations must assume prolonged exposure. Potential impacts include data leakage, unauthorized access to sensitive information, and disruption of service trustworthiness. Sectors such as government, transportation, urban planning, and research institutions using ixmaps in Europe are particularly vulnerable. The medium severity rating suggests moderate but non-trivial risk, warranting prompt mitigation to prevent exploitation and downstream impacts.

1. Implement strict input validation and output encoding on the 'trid' parameter in /map.php to neutralize malicious scripts. 2. Deploy a Web Application Firewall (WAF) with custom rules to detect and block XSS payloads targeting the 'trid' parameter. 3. Employ Content Security Policy (CSP) headers to restrict script execution sources and mitigate impact of injected scripts. 4. Conduct user awareness training to recognize suspicious links and avoid clicking untrusted URLs. 5. Monitor web server logs for unusual requests containing suspicious 'trid' parameter values indicative of exploitation attempts. 6. If feasible, isolate or sandbox the affected web application to limit potential damage. 7. Engage with the vendor or community to track any forthcoming patches or updates. 8. Consider alternative mapping solutions if mitigation is not possible or vendor support remains absent. 9. Regularly update all related software components and dependencies to reduce attack surface. 10. Test mitigations in a staging environment before deployment to ensure no disruption to legitimate functionality.