CVE-2025-57702 is a medium-severity reflected Cross-site Scripting (XSS) vulnerability identified in the DIAEnergie product by Delta Electronics. This vulnerability is classified under CWE-79, which involves improper neutralization of input during web page generation. Specifically, the flaw allows an attacker to inject malicious scripts into web pages viewed by other users. The vulnerability is reflected, meaning the malicious payload is part of the request and immediately reflected in the response without proper sanitization or encoding. According to the CVSS 4.0 vector, the attack vector is network-based (AV:N), requiring high attack complexity (AC:H), no privileges (PR:L) but some user interaction (UI:P). The vulnerability impacts the confidentiality (VC:H) and integrity (VI:L) of the system, but not availability. No authentication is required, and the scope is unchanged. The affected version is listed as "0," which likely indicates an early or initial release or a placeholder, suggesting that the vulnerability affects the current or initial versions of DIAEnergie. No patches or known exploits are currently available, indicating this is a newly disclosed vulnerability. The reflected XSS can be exploited by tricking users into clicking crafted URLs or submitting malicious input, leading to execution of arbitrary scripts in the victim's browser context. This can result in session hijacking, credential theft, or unauthorized actions performed on behalf of the user within the DIAEnergie web interface.

For European organizations using DIAEnergie, this vulnerability poses a moderate risk primarily to web application users and administrators. Exploitation could lead to unauthorized disclosure of sensitive information, such as session tokens or user credentials, potentially allowing attackers to escalate privileges or move laterally within the network. Given DIAEnergie's role in energy management or industrial automation (as suggested by the vendor's profile), compromise could disrupt operational processes or leak sensitive operational data. While the vulnerability does not directly impact system availability, the loss of confidentiality and integrity could undermine trust in the system and lead to regulatory compliance issues under GDPR, especially if personal or operational data is exposed. The requirement for user interaction means phishing or social engineering campaigns could be used to exploit this vulnerability. European organizations with web-facing DIAEnergie interfaces are at risk, particularly those in critical infrastructure sectors such as energy, manufacturing, or utilities.

To mitigate this vulnerability, organizations should implement strict input validation and output encoding on all user-supplied data within the DIAEnergie web interface. Since no official patch is currently available, immediate steps include deploying Web Application Firewalls (WAFs) configured to detect and block reflected XSS payloads targeting DIAEnergie endpoints. Security teams should conduct thorough code reviews and penetration testing focusing on input handling in the affected product. User awareness training to recognize phishing attempts and suspicious URLs can reduce the risk of successful exploitation. Network segmentation should be employed to limit access to the DIAEnergie management interfaces, restricting exposure to trusted users only. Monitoring and logging of web application traffic should be enhanced to detect anomalous requests indicative of exploitation attempts. Once a vendor patch is released, prompt application is critical. Additionally, consider implementing Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context.