CVE-2025-62940 identifies a stored Cross-site Scripting (XSS) vulnerability in the Nick Diego Blox Lite product, affecting all versions up to and including 1.2.8. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing attackers to inject malicious scripts that are stored and subsequently executed in the browsers of other users who access the affected pages. This stored XSS can be exploited remotely over the network (AV:N), requires low attack complexity (AC:L), but does require the attacker to have some privileges (PR:L) and user interaction (UI:R) to trigger the malicious payload. The scope is changed (S:C), indicating the vulnerability can affect components beyond the initially vulnerable code, potentially impacting confidentiality and integrity (C:L/I:L) but not availability (A:N). The vulnerability is classified as medium severity with a CVSS v3.1 score of 5.4. No known public exploits have been reported yet. The vulnerability affects web applications using Blox Lite, which is a web content management or page generation tool developed by Nick Diego. The lack of patches or official fixes at the time of publication suggests organizations must implement interim mitigations. Stored XSS vulnerabilities can be leveraged for session hijacking, defacement, or delivering further malware, especially in environments with multiple users or sensitive data. The vulnerability's exploitation requires some level of authentication and user interaction, which somewhat limits its risk but still poses a significant threat in targeted attacks.

For European organizations, this vulnerability could lead to unauthorized disclosure of sensitive information and manipulation of web content integrity within applications using Blox Lite. Attackers could exploit the stored XSS to hijack user sessions, steal credentials, or perform actions on behalf of legitimate users, potentially leading to data breaches or reputational damage. The impact is particularly concerning for organizations with multi-user web platforms, such as intranets, customer portals, or collaborative tools. Given the medium severity and requirement for user interaction and some privileges, the risk is moderate but non-negligible. If exploited in critical sectors like finance, healthcare, or government, the consequences could be amplified. Additionally, the lack of known exploits currently provides a window for proactive defense. However, once public exploits emerge, rapid exploitation attempts may increase. The vulnerability could also be leveraged as part of a larger attack chain, making it important to address promptly.

European organizations should immediately audit their use of Blox Lite and identify affected versions (<=1.2.8). Since no official patches are currently available, implement strict input validation and output encoding on all user-supplied data to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict script execution sources and reduce XSS impact. Limit user privileges to the minimum necessary to reduce the ability of attackers to inject malicious content. Monitor web application logs for suspicious input patterns or unusual user behavior indicative of attempted exploitation. Educate users about the risks of interacting with untrusted content and encourage cautious behavior. Plan for rapid deployment of official patches once released by the vendor. Consider deploying Web Application Firewalls (WAFs) with rules targeting stored XSS patterns specific to Blox Lite. Regularly review and update security configurations and conduct penetration testing focused on XSS vulnerabilities.