CVE-2025-62930 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the RomanCode MapSVG plugin, specifically affecting versions up to 8.7.15. The vulnerability stems from improper neutralization of user input during the generation of web pages, which allows attackers to inject malicious scripts that execute within the victim's browser context. Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side, manipulating the Document Object Model without server-side input validation. This flaw can be exploited by tricking users into interacting with crafted URLs or web pages containing malicious payloads that leverage the MapSVG plugin's vector map rendering features. The vulnerability does not require authentication, increasing its risk profile, but does require user interaction to trigger the malicious script execution. Although no public exploits have been reported yet, the vulnerability's presence in a widely used interactive map plugin poses a significant risk, especially for websites relying on MapSVG for geographic data visualization or interactive content. The lack of a CVSS score indicates the need for an expert severity assessment, which considers the potential for session hijacking, data theft, or unauthorized actions resulting from script execution in the victim's browser. The vulnerability affects confidentiality and integrity primarily, with availability impact being minimal unless combined with other attack vectors. The vendor has not yet published a patch or mitigation guidance, emphasizing the need for proactive defensive measures by users.

For European organizations, the impact of CVE-2025-62930 can be substantial, particularly for those that integrate MapSVG into customer-facing or internal web applications. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information such as authentication tokens or personal data, and potential defacement or manipulation of web content. This undermines user trust and may lead to regulatory compliance issues under GDPR, especially if personal data is compromised. Organizations in sectors such as finance, government, healthcare, and e-commerce, which often use interactive maps for service delivery or data visualization, are at heightened risk. The vulnerability could also serve as a foothold for further attacks within corporate networks if exploited in intranet environments. Given the cross-border nature of web services, the threat can propagate quickly across European digital infrastructure, affecting multiple countries simultaneously. The absence of known exploits currently provides a window for mitigation but also suggests attackers may develop exploits soon, increasing urgency for remediation.

1. Monitor for official patches from RomanCode and apply updates to MapSVG immediately upon release to remediate the vulnerability. 2. Implement strict Content Security Policies (CSP) that restrict script sources and prevent inline script execution, mitigating the impact of injected scripts. 3. Sanitize and validate all user inputs on the client side, especially those interacting with MapSVG components, to prevent malicious payloads from being processed. 4. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious requests targeting MapSVG endpoints or parameters. 5. Conduct regular security audits and penetration testing focusing on client-side vulnerabilities and third-party plugins. 6. Educate users and administrators about the risks of clicking untrusted links and the importance of reporting suspicious activities. 7. Where feasible, isolate MapSVG functionality in sandboxed iframes or separate domains to limit script execution scope. 8. Review and minimize the use of third-party plugins, replacing vulnerable components with more secure alternatives if patches are delayed.