CVE-2025-45879 is a cross-site scripting (XSS) vulnerability identified in the e-mail manager function of Miliaris Amigdala version 2.2.6. This vulnerability allows an attacker to inject and execute arbitrary HTML or JavaScript code within the context of a user's browser session when interacting with the vulnerable e-mail manager. The flaw arises due to insufficient input sanitization or output encoding in the e-mail manager's handling of user-supplied data, enabling crafted payloads to bypass security controls. When a user views or interacts with the maliciously crafted content, the injected script executes with the same privileges as the legitimate web application, potentially leading to session hijacking, credential theft, unauthorized actions on behalf of the user, or the delivery of further malware. Although no specific affected versions beyond 2.2.6 are listed, and no patches or exploits in the wild have been reported yet, the vulnerability is publicly disclosed and thus may be targeted in the future. The absence of a CVSS score limits precise severity quantification, but the nature of XSS vulnerabilities generally poses significant risks to confidentiality and integrity, especially in applications managing sensitive communications such as e-mail. The vulnerability does not appear to require authentication or user interaction beyond viewing the malicious content, increasing its exploitation potential. Given the role of Miliaris Amigdala as an e-mail management system, exploitation could impact organizational communications and user trust.

For European organizations, this XSS vulnerability in Miliaris Amigdala's e-mail manager could have several adverse effects. Successful exploitation may lead to unauthorized access to sensitive e-mail content, theft of user credentials, and session hijacking, compromising confidentiality and integrity of communications. This can result in data breaches, loss of intellectual property, and exposure of personal or corporate information. Additionally, attackers could use the vulnerability to deliver malware or conduct phishing campaigns internally, amplifying the threat. The disruption of e-mail services or user trust could impact business continuity and reputation. Organizations in sectors with strict data protection regulations such as GDPR may face compliance violations and associated penalties if such vulnerabilities are exploited. The lack of available patches increases the window of exposure, necessitating proactive risk management. The threat is particularly relevant for entities relying on Miliaris Amigdala for critical communications, including government agencies, financial institutions, and large enterprises across Europe.

Given the absence of official patches, European organizations using Miliaris Amigdala v2.2.6 should implement the following specific mitigations: 1) Employ web application firewalls (WAFs) with custom rules to detect and block typical XSS payload patterns targeting the e-mail manager endpoints. 2) Conduct thorough input validation and output encoding at the application layer if source code access and modification are possible, focusing on sanitizing all user-controllable inputs in the e-mail manager. 3) Restrict or disable HTML rendering in e-mail content within the application or client where feasible, limiting the attack surface. 4) Implement Content Security Policy (CSP) headers to restrict the execution of inline scripts and reduce the impact of injected code. 5) Educate users to be cautious with unexpected or suspicious e-mails and links, as user interaction may still be required to trigger the vulnerability. 6) Monitor application logs and network traffic for anomalous activities indicative of exploitation attempts. 7) Engage with the vendor or community for updates and patches, and plan for timely upgrades once fixes are available. 8) Consider isolating the e-mail management system from critical networks or limiting access to trusted users to reduce exposure.