CVE-2025-61198 is a stored cross-site scripting (XSS) vulnerability identified in multiple models of the Optimod product line, specifically versions 1.0.0.33 and system version 2.5.26. The vulnerability arises because the web-based management interface improperly sanitizes log data before rendering it in the user interface. An attacker can remotely inject malicious JavaScript code into log entries by submitting specially crafted input that gets recorded in logs. When a legitimate user or administrator accesses the logs via the web UI, the malicious script executes in their browser context. This can lead to a range of attacks including session hijacking, theft of authentication tokens, unauthorized actions on behalf of the user, or pivoting deeper into the network. The vulnerability does not require user interaction beyond viewing the logs, and no authentication is necessarily required to inject the payload if the logging mechanism is exposed. Although no known exploits are currently reported in the wild, the nature of stored XSS makes it a persistent threat once exploited. The lack of a CVSS score means severity must be inferred from impact and exploitability factors. The affected products are specialized broadcast and audio processing devices, often used in media and telecommunications sectors. The vulnerability highlights insufficient input validation and output encoding in the web management interface, a common security oversight in embedded device software.

For European organizations, especially those in broadcasting, media production, and telecommunications sectors that deploy Optimod devices, this vulnerability poses a significant risk. Successful exploitation could allow attackers to execute arbitrary JavaScript in the browsers of network administrators or operators, potentially leading to credential theft, session hijacking, or unauthorized control over device management interfaces. This could disrupt critical media processing workflows or enable further lateral movement within corporate networks. The persistence of stored XSS increases the risk as malicious scripts remain in logs until removed. Given the specialized nature of the affected devices, organizations relying on these for audio processing or broadcast signal management could face operational disruptions or data breaches. Additionally, if these devices are accessible from less secure network segments or exposed to the internet, the attack surface increases. The impact on confidentiality, integrity, and availability of systems and data is moderate to high, depending on the role of the compromised user and network segmentation. European regulatory frameworks such as GDPR also impose strict requirements on protecting user data and system integrity, increasing the compliance risk if exploited.

1. Immediately restrict access to the web management interface of affected Optimod devices to trusted internal networks and authenticated users only. 2. Implement strict input validation and output encoding on all user-controllable fields that are logged and rendered in the UI to prevent injection of malicious scripts. 3. Monitor logs for suspicious entries that may contain script tags or unusual payloads and remove them promptly. 4. Deploy web application firewalls (WAFs) or intrusion detection systems (IDS) capable of detecting and blocking XSS payloads targeting these devices. 5. Coordinate with the vendor to obtain patches or firmware updates addressing this vulnerability as soon as they become available. 6. Educate administrators and operators to avoid clicking or interacting with suspicious log entries and to report anomalies immediately. 7. Conduct regular security audits and penetration tests focusing on web interfaces of embedded devices. 8. Segment the network to isolate critical broadcast and media infrastructure from general user networks and the internet. 9. Use multi-factor authentication for accessing management interfaces to reduce risk from stolen credentials. 10. Maintain up-to-date backups of device configurations to enable rapid recovery if compromise occurs.