CVE-2025-53707 identifies a reflected cross-site scripting (XSS) vulnerability in MedDream PACS Premium version 7.3.6.870, a medical imaging software widely used in healthcare environments. The flaw exists in the modifyTranscript functionality, where user-supplied input is improperly neutralized during web page generation, allowing an attacker to inject arbitrary JavaScript code. This vulnerability is triggered when a victim clicks on a specially crafted malicious URL containing the payload. Because it is a reflected XSS, the malicious script is not stored on the server but reflected off the web application in the HTTP response. The CVSS 3.1 base score of 6.1 indicates medium severity, with the vector string AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N showing that the attack is network exploitable, requires no privileges, but does require user interaction, and impacts confidentiality and integrity with a scope change. The vulnerability does not affect availability. No patches or exploits are currently publicly available, but the risk remains for phishing or targeted attacks leveraging this flaw to execute scripts in the context of the victim's browser session. This could lead to session hijacking, theft of sensitive information, or manipulation of web content. The vulnerability is categorized under CWE-79, which is a common and well-understood web security issue. Given the critical nature of healthcare data and the reliance on PACS systems for medical imaging workflows, exploitation could have serious privacy and operational implications.

For European organizations, particularly healthcare providers using MedDream PACS Premium, this vulnerability could lead to unauthorized disclosure of sensitive patient information or session hijacking through browser-based attacks. Although the vulnerability does not directly impact system availability, successful exploitation could undermine trust in healthcare IT systems and lead to regulatory compliance issues under GDPR due to potential data leakage. Attackers could use social engineering to trick medical staff into clicking malicious links, enabling them to execute scripts that steal authentication tokens or manipulate displayed data. This could disrupt clinical workflows or lead to incorrect medical decisions if data integrity is compromised. The impact is heightened in Europe due to stringent data protection laws and the critical nature of healthcare services. Additionally, the cross-site scripting vulnerability could serve as an entry point for more complex attacks, including lateral movement within hospital networks or deployment of further malware.

Organizations should prioritize updating MedDream PACS Premium to a patched version once the vendor releases a fix. Until then, implement strict input validation and output encoding on all user-supplied data in the modifyTranscript functionality to prevent script injection. Employ web application firewalls (WAFs) with rules designed to detect and block reflected XSS payloads targeting this application. Conduct regular security awareness training for healthcare staff to recognize and avoid phishing attempts involving suspicious URLs. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. Monitor web server logs for unusual URL patterns that may indicate exploitation attempts. Segregate PACS systems from general user networks to limit exposure. Finally, review and enhance incident response plans to quickly address any detected exploitation attempts.