CVE-2025-47557 is a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, affecting the RomanCode MapSVG product up to version 8.5.31. Stored XSS occurs when malicious input is improperly neutralized during web page generation and is persistently stored by the application, later executed in the browsers of users who access the affected content. In this case, the vulnerability arises from insufficient input sanitization or output encoding in the MapSVG plugin, which is commonly used to create interactive vector maps on websites. An attacker can exploit this flaw by injecting malicious scripts into the MapSVG data inputs, which are then stored and rendered to other users without proper sanitization. This can lead to unauthorized script execution in the context of the victim's browser session. The CVSS v3.1 score of 6.5 (medium severity) reflects that the vulnerability can be exploited remotely over the network (AV:N) with low attack complexity (AC:L), requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability to a limited extent (C:L/I:L/A:L). No known exploits are currently reported in the wild, and no official patches have been linked yet. However, the vulnerability poses a significant risk to web applications using MapSVG, especially those that allow authenticated users to input or modify map data that is then displayed to others. Exploitation could lead to session hijacking, defacement, or redirection to malicious sites, undermining user trust and potentially leading to further compromise.

For European organizations, the impact of this vulnerability can be substantial, particularly for businesses and government entities that rely on MapSVG for interactive mapping solutions on their websites. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information, or manipulation of displayed data. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR violations if personal data is exposed), and cause operational disruptions. Sectors such as tourism, municipal services, logistics, and any industry using geographic data visualization are at risk. The requirement for authenticated access to exploit the vulnerability somewhat limits the attack surface but does not eliminate risk, especially if user credentials are weak or compromised. Additionally, the cross-site scripting nature of the vulnerability can be leveraged as a stepping stone for more advanced attacks like phishing or malware distribution targeting European users.

Organizations should immediately audit their use of the MapSVG plugin and restrict input capabilities to trusted users only. Implement strict input validation and output encoding on all user-supplied data related to MapSVG maps. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. Monitor web application logs for unusual input patterns or script injections. Since no official patches are currently available, consider temporarily disabling or restricting the MapSVG functionality until a vendor patch is released. Educate users about phishing risks and encourage strong authentication practices to reduce the risk of credential compromise. Additionally, conduct regular security assessments and penetration testing focused on web application vulnerabilities, including XSS. Once a patch is available, prioritize its deployment to remediate the vulnerability.