CVE-2025-57701 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, allowing malicious scripts to be injected and executed in the context of a victim's browser. Specifically, the reflected XSS occurs when untrusted input is included in web responses without proper sanitization or encoding, enabling attackers to craft malicious URLs or inputs that, when visited or submitted by users, execute arbitrary JavaScript code. The CVSS 4.0 base score of 5.9 reflects a scenario where the attack vector is network-based (AV:N), but requires high attack complexity (AC:H), low privileges (PR:L), and user interaction (UI:P). The vulnerability impacts confidentiality (VC:H) and integrity (VI:L) of the affected system, but not availability. No known exploits are currently reported in the wild, and no patches have been published yet. The affected version is listed as "0," which likely indicates an initial or default version of the DIAEnergie software. The vulnerability's presence in a web-facing interface of an energy management or industrial automation product suggests potential risks in operational environments where such systems are deployed. Attackers exploiting this vulnerability could execute malicious scripts to steal session tokens, perform actions on behalf of authenticated users, or deliver further payloads, potentially leading to unauthorized access or manipulation of system data.

For European organizations, especially those in the energy sector or industrial automation that deploy Delta Electronics' DIAEnergie product, this reflected XSS vulnerability poses a risk of client-side attacks that can compromise user sessions and data integrity. While the vulnerability does not directly impact system availability, the ability to execute arbitrary scripts can facilitate phishing, credential theft, or unauthorized commands within the application context. Given the critical role of energy management systems in infrastructure, exploitation could indirectly affect operational reliability or data trustworthiness. European organizations with remote or web-accessible management interfaces are particularly at risk, as attackers can lure users into clicking malicious links or submitting crafted inputs. The medium severity indicates that while exploitation is not trivial, the potential for lateral movement or escalation exists if combined with other vulnerabilities or misconfigurations. The lack of known exploits suggests a window for proactive mitigation before widespread attacks occur.

1. Implement strict input validation and output encoding on all user-supplied data within the DIAEnergie web interface to neutralize malicious scripts. 2. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the system. 3. Restrict access to the DIAEnergie management interface via network segmentation and VPNs to limit exposure to trusted users only. 4. Educate users about the risks of clicking unknown or suspicious links related to the DIAEnergie system. 5. Monitor web logs for unusual input patterns or repeated attempts to inject scripts. 6. Coordinate with Delta Electronics for timely patch releases and apply updates as soon as they become available. 7. Use web application firewalls (WAFs) with rules tailored to detect and block reflected XSS payloads targeting DIAEnergie endpoints. 8. Review and enforce least privilege principles for user accounts interacting with the system to reduce impact if a session is compromised.