CVE-2025-62051 is a cross-site scripting (XSS) vulnerability identified in the AndonDesign UDesign Core product, specifically affecting versions up to and including 4.14.1. This vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows an attacker to inject malicious scripts into web content. The vulnerability requires an attacker to have low-level privileges (PR:L) and necessitates user interaction (UI:R) to trigger the exploit, such as convincing a user to click a crafted link or submit malicious input. The attack vector is network-based (AV:N), meaning exploitation can occur remotely over the internet. The vulnerability impacts confidentiality, integrity, and availability (C:L/I:L/A:L) of the affected system, potentially enabling session hijacking, unauthorized actions on behalf of users, or defacement of web pages. The scope is changed (S:C), indicating that exploitation can affect resources beyond the initially vulnerable component. Although no known exploits are currently reported in the wild, the presence of this vulnerability in a core web design framework poses a risk to any web applications built upon it. The CVSS v3.1 base score of 6.5 reflects a medium severity level, balancing the ease of exploitation with the requirement for authentication and user interaction. The vulnerability was reserved in early October 2025 and published in November 2025, with no patches currently linked, indicating that remediation may still be pending or in progress.

For European organizations, this vulnerability poses a moderate risk primarily to web applications and services built using the UDesign Core framework. Exploitation could lead to unauthorized disclosure of sensitive information, session hijacking, or manipulation of web content, which can damage organizational reputation and lead to compliance issues under GDPR if personal data is exposed. The requirement for authentication and user interaction limits the attack surface but does not eliminate risk, especially in environments with many users or where social engineering is feasible. Organizations in sectors with high web presence such as e-commerce, government portals, and digital services are particularly vulnerable. Additionally, the potential for scope change means that exploitation could affect multiple components or users beyond the initial entry point, increasing the risk of broader compromise. The absence of known exploits in the wild provides a window for proactive mitigation, but the medium severity score demands timely attention to prevent exploitation as threat actors develop attack methods.

European organizations should implement the following specific mitigations: 1) Monitor AndonDesign’s official channels for patches or updates addressing CVE-2025-62051 and apply them promptly once available. 2) Conduct a thorough audit of all web applications using UDesign Core to identify instances of untrusted input being rendered without proper sanitization. 3) Implement strict input validation and output encoding on all user-supplied data before rendering it in web pages to prevent script injection. 4) Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5) Educate users about the risks of interacting with suspicious links or inputs to reduce the likelihood of successful social engineering. 6) Use web application firewalls (WAFs) configured to detect and block common XSS attack patterns targeting UDesign Core applications. 7) Review and limit user privileges to the minimum necessary to reduce the potential impact of an authenticated attacker. 8) Regularly scan web applications for XSS vulnerabilities using automated tools and penetration testing to detect similar issues proactively.