CVE-2025-62051 is a cross-site scripting (XSS) vulnerability identified in AndonDesign's UDesign Core product, affecting versions up to and including 4.14.1. The 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. This type of vulnerability can lead to the execution of arbitrary JavaScript in the context of the victim's browser, potentially resulting in session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The attack vector is network-based (AV:N), with low attack complexity (AC:L), but requires privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the security scope of the vulnerable component. Confidentiality, integrity, and availability impacts are all rated low but present. No public exploits are currently known, and no patches have been linked yet. The vulnerability was reserved in early October 2025 and published in November 2025. The vulnerability primarily affects web applications using UDesign Core, which is a framework or component used in web design and development by AndonDesign. The lack of proper input sanitization during page generation is the root cause, allowing malicious input to be embedded in the output HTML or scripts.

For European organizations, the impact of CVE-2025-62051 can be significant, especially for those relying on UDesign Core in their web infrastructure. Successful exploitation can lead to session hijacking, enabling attackers to impersonate legitimate users and access sensitive data or perform unauthorized actions. This can compromise user confidentiality and integrity of data, and potentially disrupt availability if the attacker defaces websites or injects disruptive scripts. Organizations in sectors with high web presence, such as e-commerce, government portals, and financial services, are at higher risk. The requirement for authenticated access and user interaction limits the attack surface but does not eliminate risk, particularly in environments with many users or where social engineering can be leveraged. The vulnerability could also be used as a foothold for further attacks within the network. Given the interconnected nature of European digital services, exploitation could have cascading effects on trust and service continuity.

Organizations should monitor AndonDesign’s official channels for patches addressing CVE-2025-62051 and apply them promptly once available. Until patches are released, implement strict input validation and output encoding on all user inputs processed by UDesign Core components to prevent injection of malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Conduct thorough code reviews and penetration testing focusing on input handling in web page generation modules. Limit user privileges to the minimum necessary to reduce the risk posed by authenticated attackers. Educate users about phishing and social engineering tactics to reduce the likelihood of user interaction with malicious payloads. Additionally, deploy web application firewalls (WAFs) configured to detect and block XSS attack patterns targeting UDesign Core endpoints. Maintain robust logging and monitoring to detect suspicious activities indicative of exploitation attempts.